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range from sea level at the mouth to 3,000 feet (910 m) along the western ridge to 6,000 feet (1,800 m) in the headwaters. Principal tributaries to the Mad River include South Fork Mad River, North Fork Mad River, Barry Creek, Pilot Creek, Deer Creek, Bug Creek, Graham Creek, Grace Flat, Blue Slide Creek, Boulder Creek, Maple Creek, Canõn Creek, Lindsey Creek, and Mill (Hall) Creek.
1168:
The Mad River drains approximately 497 square miles (1,290 km) of the Coast Range
Geomorphic Province and empties into the Pacific Ocean north of Humboldt Bay in Humboldt County, California. The basin is about 100 miles (160 km) in length and averages six miles (10 km) wide. Elevations
1135:
to its mouth, plus the greater
Humboldt Bay region) who spoke a dialect affiliated with the Algonquian language family, with upriver reaches controlled by three different groups whose languages are related to the Athabascan family, the Whilkut, Nongatl and Lassik (Baumhoff 1958). Today, among these
1215:
In the 1960s, a dam for the Mad River in
Humboldt County was proposed by the Army Corps of Engineers. The proposed blockage would have flooded the Maple Creek/Butler Valley area and adversely affected the health of the Mad River watershed. Gradually the opposition from the community, including the
1680:
Before entering the ocean, the river turns abruptly north near the triple junction of the Gorda, North
American, and Pacific plates. This bend denotes the usual upper limit of the estuary, although brackish waters can extend as far upstream as Highway 101 during king tides. Although small, this
1616:
production. Green
Diamond is by far the largest landowner in the watershed, with about 42 percent of all land. The next largest landowners are R. Emmerson and Humboldt Redwood Company (formerly the Pacific Lumber Company), with 3 and 2 percent respectively. There are quite a few ranchers and
1247:. In 1992, the Environmental Protection Agency listed the Mad River under section 303(d) of the California Clean Water Act Section as sediment impaired, due to elevated erosion and siltation. In 2006, the river was additionally listed as temperature and turbidity-impaired.
1185:
911:
2138:
Charles F. Yocum; William A. Stumpf; Kennedy M. Perkins (May–August 1956). "Status of Beaver
Formerly Introduced into the Mad River and River Otter in Northwestern California".
350:
346:
354:
1964:
362:
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for agricultural water supplies and is free-flowing for 85 percent of its length. Matthews Dam, about one third of the way down the river from its source, forms
1796:) in 1954, from the river mouth to well upstream. These beaver were re-introduced into the North Fork Mad River in 1946, or possibly were migrants from the
2167:
1140:
and the Wiyot Tribe of the Table Bluff
Reservation are federally recognized tribes and the United States holds lands in trust for their citizens. The
2187:
2192:
1216:
urban areas of the county, forced a suspension of the project schedule and finally the cancellation of the project. The dam was never built.
1212:(59,000,000 m) of water; and releases power a two megawatt hydro-electric plant generating 5 million kwh during an average water year.
201:
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vegetation (primarily due to conversion of natural lands to ranching purposes) increases erosion and urbanization causes decreased
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136:
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2006:
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Before Euro-American settlers arrived in the mid-1800s, the native peoples occupying the lower Mad River watershed were the
1996:
1781:
1621:
companies that own smaller, but still sizable, parcels. Private residences, open space and parks make up most of the rest.
2197:
1859:
1629:
The river provides recreational opportunities and important habitat to fish and wildlife. Flora of the area includes the
889:
1971:
1677:) - are also listed as present in the estuarine portion of the Mad River, but have not been observed in recent years.
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1970:(Report). Eureka,California: Redwood Community Action Agency and Natural Resources Management Corp. Archived from
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2044:
1851:
1609:
1817:
987:
383:
1231:
buildup in the river and its tributaries. The main causes of the erosion are excessive road building and
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79:
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93:
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28:
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1749:) are present in the estuary year-round. Above the estuary, the Mad River is home to resident
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8:
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in the Mad River in 1997, 1999, and 2000, respectively. Two threatened osmerid species -
1137:
1092:
2072:. Arcata, CA: Humboldt State University Special Collections, Humboldt State University.
1658:
1193:
1189:
1180:. The dam is owned by Humboldt Bay Municipal Water District, which provides water from
1108:
960:
2002:
1932:
1785:
1205:
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U.S. Geological Survey. National
Hydrography Dataset high-resolution flowline data.
1160:
lost his temper when his exploration party did not wait for him at the river mouth.
2137:
1181:
534:
1717:), and as a summer feeding ground for several marine species, including topsmelt (
1156:
in the 1860s. The river was named in
December, 1849 in memory of an incident when
2111:
Seasonal fish and invertebrate communities in three northern
California estuaries
1893:
1710:
1686:
1685:(Sebastes melanops, S. rastrelliger) and several species of flatfish, including
1095:. It flows for 113 miles (182 km) in a roughly northwest direction through
2109:
1682:
1646:
1220:
1177:
1153:
1084:
556:
2126:
Water Quality Control Policy for the Enclosed Bays and Estuaries of California
1998:
California Place Names: The Origin and Etymology of Current Geographical Names
2181:
1758:
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1608:, but the vast majority of the river flows through private land, even in the
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1637:), a wildflower which was named for the river. Key fish species include
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69:
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U.S. Geological Survey Geographic Names Information System: Mad River
1709:). The estuary also serves as a migration corridor for salmonids and
1209:
2048:
1739:
prickly sculpin (Cottus asper), coast range sculpin (C. aleuticus),
1670:
1228:
1232:
1224:
1145:
1141:
1907:"Wiyot Tribe Declares State of Emergency Regarding Local Rivers"
1103:, draining a 497-square-mile (1,290 km) watershed into the
40:
2083:
1618:
1613:
1994:
1825:- the small community near the western extent of Ruth Lake.
1780:
The Mad River Estuary is recognized for protection by the
335:
South Fork Mad River, Blue Slide Creek, Littlefield Creek
33:
The Mad River about 4 miles (6.4 km) above the mouth
2047:. Humboldt Bay Municipal Water District. Archived from
1163:
1962:
1223:, as for many rivers in this area of the state, is
2032:Water Quality Control Plan North Coastal Basin 1B
2179:
1933:"(ACV) CALIFORNIA REDWOOD COAST-HUMBOLDT COUNTY"
983:
369:
2001:. University of California Press. p. 223.
1235:, especially historical logging practices like
1200:and numerous unincorporated communities in the
1784:. The Mad River watershed was described as at
2114:(Master's Thesis). Humboldt State University.
1958:
1956:
1954:
1965:Mad River Watershed Assessment Final Report
1612:. About 64 percent of the land is used for
1136:distinct groups, only the Wiyot-affiliated
1604:The upper half of the river is inside the
934:
1951:
599:
308:81,000 cu ft/s (2,300 m/s)
2168:California Department of Water Resources
1152:were essentially annihilated during the
1995:Erwin G. Gudde; William Bright (2004).
1259:Climate data for Mad River, California
288:1,573 cu ft/s (44.5 m/s)
2180:
2107:
1847:
1845:
1219:The greatest problem of the Mad River
2188:Rivers of Humboldt County, California
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2103:
2101:
2026:
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1881:
1879:
1775:Catostomas occidentalis humboldtianus
1681:estuary provides nursery habitat for
357:, Canõn Creek, North Fork Mad River,
345:Barry Creek, Pilot Creek, Bug Creek,
2193:Rivers of Trinity County, California
2124:State Water Resources Control Board
2076:
1782:California Bays and Estuaries Policy
1188:for municipal and industrial use in
1115:. The river's headwaters are in the
298:17 cu ft/s (0.48 m/s)
2108:Osborn, Katherine (December 2017).
1842:
1831:, which parallels much of the river
254:497 sq mi (1,290 km)
13:
2098:
2021:
1876:
1657:), which were federally-listed as
16:River in California, United States
14:
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2157:Friends of the Mad River Hatchery
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1939:. Federal Aviation Administration
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1164:Watershed and river modifications
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1873:elevation for source coordinates
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1798:Little River (Humboldt County)
1239:. In addition, the removal of
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195: • coordinates
130: • coordinates
45:Map of the Mad River watershed
1:
2203:Rivers of Northern California
1835:
1522:Average snowfall inches (cm)
100:Physical characteristics
1963:Stillwater Sciences (2010).
1818:List of rivers in California
234: • elevation
173:4,845 ft (1,477 m)
169: • elevation
7:
1811:
1599:
1378:Mean daily minimum °F (°C)
1308:Mean daily maximum °F (°C)
272: • location
118: • location
10:
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2198:Six Rivers National Forest
2128:(1974) State of California
1802:North American river otter
1624:
1606:Six Rivers National Forest
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411:Six Rivers National Forest
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294: • minimum
284: • average
2162:The Trust for Public Land
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2070:Butler Valley Collection
1896:, accessed March 9, 2011
1829:South Fork Trinity River
1773:), and Humboldt sucker (
1731:Pacific staghorn sculpin
341: • right
1771:Catostomas occidentalis
1751:coastal cutthroat trout
1747:Gasterosteous aculeatus
1743:Three-spine stickleback
1707:Citharichthys stigmaeus
1635:Erigeron maniopotamicus
331: • left
123:California Coast Ranges
2045:"Hydro-Electric Plant"
1808:) were also numerous.
1675:Thaleichthys pacificus
1667:Spirinchus thaleichthy
1091:) is a river in upper
217:40.94194°N 124.13500°W
152:40.20556°N 123.15639°W
1823:Mad River, California
1790:North American beaver
1691:Platichthys stellatus
1107:north of the town of
827:North Fork Mad River
452:South Fork Mad River
2030:State of California
1788:with 22 colonies of
1699:Pleuronectes vetulus
1643:Oncorhynchus kisutch
1174:groundwater recharge
1131:(from approximately
238:0 ft (0 m)
222:40.94194; -124.13500
157:40.20556; -123.15639
1735:Leptocottus armatus
1727:Hypomesus pretiosis
1715:Lampetra tridentata
1172:The river provides
1138:Blue Lake Rancheria
1093:Northern California
787:Butler Valley Road
317:Basin features
213: /
148: /
1892:2012-03-29 at the
1719:Atherinops affinis
1653:), and steelhead (
1631:Mad River fleabane
1227:causing excessive
869:Mill (Hall) Creek
578:R.W. Matthews Dam
514:Littlefield Creek
2008:978-0-520-24217-3
1806:Lontra canadensis
1794:Castor canadensis
1786:carrying capacity
1767:Sacramento sucker
1763:O. mykiss irideus
1683:juvenile rockfish
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1182:Ranney collectors
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1158:Dr. Josiah Gregg
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2084:"Mad River, CA"
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2034:July 1975 p.13
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382:
379:
378:
374:
373:
366:
365:
343:
337:
336:
333:
327:
326:
323:
319:
318:
314:
313:
310:
309:
306:
300:
299:
296:
290:
289:
286:
280:
279:
274:
268:
267:
264:
260:
259:
256:
255:
252:
248:
247:
244:
240:
239:
236:
233:
230:
229:
197:
194:
191:
190:
185:
179:
178:
175:
174:
171:
165:
164:
132:
126:
125:
120:
114:
113:
110:
106:
105:
102:
101:
97:
96:
91:
87:
86:
77:
73:
72:
67:
63:
62:
57:
53:
52:
48:
47:
44:
36:
35:
32:
24:
23:
15:
9:
6:
4:
3:
2:
2215:
2204:
2201:
2199:
2196:
2194:
2191:
2189:
2186:
2185:
2183:
2174:
2171:
2169:
2166:
2163:
2160:
2158:
2155:
2154:
2141:
2134:
2127:
2121:
2113:
2112:
2104:
2102:
2085:
2079:
2071:
2065:
2051:on 2010-09-04
2050:
2046:
2040:
2033:
2027:
2025:
2010:
2004:
2000:
1999:
1991:
1977:on 2011-08-23
1973:
1966:
1959:
1957:
1955:
1938:
1934:
1928:
1913:. Wiyot Tribe
1912:
1908:
1902:
1895:
1891:
1888:
1882:
1880:
1872:
1867:
1861:
1857:
1853:
1848:
1846:
1841:
1830:
1827:
1824:
1821:
1819:
1816:
1815:
1809:
1807:
1803:
1799:
1795:
1791:
1787:
1783:
1778:
1776:
1772:
1768:
1764:
1760:
1759:rainbow trout
1756:
1752:
1748:
1744:
1740:
1736:
1732:
1728:
1724:
1720:
1716:
1712:
1708:
1704:
1700:
1696:
1692:
1688:
1684:
1678:
1676:
1672:
1668:
1664:
1663:longfin smelt
1660:
1656:
1652:
1648:
1644:
1640:
1636:
1632:
1622:
1620:
1615:
1611:
1607:
1592:Source: NOAA
1590:
1584:
1579:
1574:
1569:
1564:
1559:
1554:
1549:
1544:
1539:
1534:
1529:
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1504:
1499:
1494:
1489:
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1469:
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1451:
1450:precipitation
1446:
1440:
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1425:
1420:
1415:
1410:
1405:
1400:
1395:
1390:
1385:
1380:
1376:
1370:
1365:
1360:
1355:
1350:
1345:
1340:
1335:
1330:
1325:
1320:
1315:
1310:
1306:
1262:
1257:
1248:
1246:
1245:water quality
1242:
1238:
1237:clear-cutting
1234:
1230:
1226:
1222:
1217:
1213:
1211:
1207:
1203:
1199:
1195:
1191:
1187:
1183:
1179:
1175:
1170:
1161:
1159:
1155:
1151:
1147:
1143:
1139:
1134:
1130:
1120:
1118:
1114:
1113:McKinleyville
1110:
1106:
1105:Pacific Ocean
1102:
1098:
1094:
1090:
1086:
1082:
1069:
1067:
1065:
1063:
1061:
1059:
1057:
1056:
1053:
1052:Pacific Ocean
1048:
1039:
1037:
1034:
1031:
1030:McKinleyville
1026:
1017:
1015:
1012:
1006:
997:
995:
992:
989:
979:
970:
968:
965:
962:
957:
948:
946:
943:
940:
930:
921:
919:
916:
913:
908:
899:
897:
894:
891:
890:Lindsay Creek
886:
877:
875:
872:
866:
857:
855:
852:
849:
844:
835:
833:
830:
824:
815:
813:
810:
804:
795:
793:
790:
784:
775:
773:
770:
764:
755:
753:
750:
744:
735:
733:
730:
724:
715:
713:
710:
707:Graham Creek
704:
695:
693:
690:
684:
675:
673:
670:
664:
655:
653:
650:
644:
635:
633:
630:
627:
622:
613:
611:
608:
605:
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586:
584:
581:
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531:
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520:
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489:
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469:
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449:
440:
438:
435:
429:
420:
418:
415:
412:
407:
398:
396:
393:
390:
389:
385:
381:
380:
372:
371:
364:
360:
359:Lindsay Creek
356:
352:
351:Boulder Creek
348:
344:
338:
334:
328:
324:
320:
315:
311:
307:
301:
297:
291:
287:
281:
278:
277:McKinleyville
275:
269:
265:
261:
257:
253:
249:
245:
241:
237:
231:
226:
198:
192:
189:
188:Pacific Ocean
186:
184:
180:
176:
172:
166:
161:
133:
127:
124:
121:
115:
111:
107:
103:
98:
95:
94:McKinleyville
92:
88:
85:
81:
78:
74:
71:
68:
64:
61:
60:United States
58:
54:
49:
42:
37:
30:
25:
20:
2140:The Murrelet
2139:
2133:
2125:
2120:
2110:
2088:. Retrieved
2078:
2064:
2053:. Retrieved
2049:the original
2039:
2031:
2012:. Retrieved
1997:
1990:
1979:. Retrieved
1972:the original
1941:. Retrieved
1937:adip.faa.gov
1936:
1927:
1915:. Retrieved
1911:www.wiyot.us
1910:
1901:
1871:Google Earth
1866:
1805:
1793:
1779:
1774:
1770:
1762:
1754:
1746:
1738:
1734:
1726:
1718:
1714:
1706:
1698:
1695:English sole
1690:
1679:
1674:
1666:
1654:
1650:
1642:
1634:
1628:
1603:
1452:inches (mm)
1218:
1214:
1202:Humboldt Bay
1171:
1167:
1126:
1088:
1080:
1078:
807:Canõn Creek
767:Maple Creek
647:Pilot Creek
493:Ruth Airport
472:Barry Creek
432:Three Forks
347:Graham Creek
1639:coho salmon
1117:Coast Range
988:US 101
939:SR 299
667:Deer Creek
355:Maple Creek
322:Tributaries
220: /
155: /
2182:Categories
2055:2010-08-23
2014:2011-03-24
1981:2011-03-24
1836:References
1723:surf smelt
1659:threatened
1517:(1,494.8)
1204:area. The
1009:Tyee City
687:Bug Creek
604:SR 36
363:Mill Creek
251:Basin size
205:40°56′31″N
143:123°9′23″W
140:40°12′20″N
70:California
1943:1 January
1917:1 January
1655:O. mykiss
1210:acre-feet
1206:reservoir
1198:Blue Lake
1133:Blue Lake
1111:near in
1099:and then
1081:Mad River
848:Blue Lake
626:Mad River
375:Mad River
263:Discharge
208:124°8′6″W
22:Mad River
1890:Archived
1812:See also
1671:eulachon
1600:Land use
1448:Average
1241:riparian
1229:sediment
1089:Baduwa't
80:Humboldt
76:Counties
51:Location
2090:July 6,
1701:), and
1625:Ecology
1587:(85.6)
1438:(−0.4)
1413:(10.5)
1388:(−0.1)
1383:(−0.4)
1373:(19.4)
1363:(13.7)
1358:(22.3)
1353:(28.8)
1348:(31.1)
1343:(30.8)
1338:(25.1)
1333:(20.4)
1328:(15.8)
1323:(13.4)
1318:(11.8)
1251:Climate
1233:logging
1225:erosion
1146:Nongatl
1142:Whilkut
1123:History
84:Trinity
56:Country
2086:. NOAA
2005:
1721:) and
1669:) and
1619:lumber
1614:timber
1577:(4.3)
1572:(0.0)
1567:(0.0)
1562:(0.0)
1557:(0.0)
1552:(0.0)
1547:(0.0)
1542:(3.3)
1512:(297)
1507:(184)
1502:(110)
1492:(5.8)
1487:(3.0)
1467:(204)
1462:(240)
1457:(280)
1443:(3.9)
1433:(1.6)
1428:(3.7)
1423:(7.4)
1418:(9.9)
1408:(7.6)
1403:(4.7)
1398:(2.0)
1393:(0.8)
1368:(9.4)
1313:(9.8)
1264:Month
1194:Arcata
1190:Eureka
1150:Lassik
1109:Arcata
961:Arcata
384:Legend
325:
266:
243:Length
112:
109:Source
2164:(PDF)
1975:(PDF)
1968:(PDF)
1582:(14)
1537:(21)
1532:(19)
1527:(24)
1515:58.92
1510:11.71
1497:(15)
1482:(15)
1477:(44)
1472:(97)
1455:11.03
1303:Year
1186:Essex
1184:near
1129:Wiyot
1085:Wiyot
912:Essex
183:Mouth
66:State
2092:2024
2003:ISBN
1945:2023
1919:2023
1860:GNIS
1856:USGS
1741:and
1585:33.9
1505:7.26
1500:4.34
1495:0.60
1490:0.23
1485:0.12
1480:0.61
1475:1.73
1470:3.81
1465:8.02
1460:9.46
1441:39.1
1436:31.2
1431:34.9
1426:38.7
1421:45.4
1416:49.9
1411:50.9
1406:45.6
1401:40.5
1396:35.6
1391:33.4
1386:31.8
1381:31.3
1371:66.9
1366:48.9
1361:56.7
1356:72.2
1351:83.9
1346:87.9
1341:87.5
1336:77.2
1331:68.8
1326:60.4
1321:56.2
1316:53.2
1311:49.7
1300:Dec
1297:Nov
1294:Oct
1291:Sep
1288:Aug
1285:Jul
1282:Jun
1279:May
1276:Apr
1273:Mar
1270:Feb
1267:Jan
1148:and
1079:The
535:Ruth
90:City
1777:).
1765:),
1757:),
1729:).
1693:),
1645:),
1580:5.7
1575:1.7
1570:0.0
1565:0.0
1560:0.0
1555:0.0
1550:0.0
1545:0.0
1540:1.3
1535:8.4
1530:7.3
1525:9.5
2184::
2100:^
2023:^
1953:^
1935:.
1909:.
1878:^
1858:,
1854:,
1844:^
1800:.
1737:)
1196:,
1192:,
1144:,
1087::
361:,
353:,
349:,
82:,
2142:.
2094:.
2058:.
2017:.
1984:.
1947:.
1921:.
1804:(
1792:(
1769:(
1761:(
1753:(
1745:(
1733:(
1725:(
1713:(
1705:(
1697:(
1689:(
1673:(
1665:(
1649:(
1641:(
1633:(
1083:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
