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78:is for topics specifically related to the decade
513:1820s in the United States by state or territory
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479:This category contains only the following page.
476:Pages in category "1820s in Pennsylvania"
481:This list may not reflect recent changes
242:1820s disestablishments in Pennsylvania
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259:1820s establishments in Pennsylvania
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436:1829 in Pennsylvania
419:1828 in Pennsylvania
402:1827 in Pennsylvania
385:1826 in Pennsylvania
368:1825 in Pennsylvania
351:1824 in Pennsylvania
334:1823 in Pennsylvania
317:1822 in Pennsylvania
300:1821 in Pennsylvania
283:1820 in Pennsylvania
68:North America portal
40:United States portal
26:Pennsylvania portal
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263:(10 C, 1 P)
507:Categories
355:(3 C, 1 P)
76:category
464:(10 C)
440:(2 C)
423:(3 C)
406:(2 C)
389:(2 C)
372:(2 C)
338:(2 C)
321:(3 C)
304:(2 C)
287:(2 C)
246:(3 C)
148:1870s
143:1860s
138:1850s
133:1840s
128:1830s
123:1820s
118:1810s
113:1800s
108:1790s
103:1780s
98:1770s
81:1820s
74:This
211:24th
206:23rd
201:22nd
196:21st
191:20th
185:19th
179:18th
174:17th
169:16th
164:15th
159:14th
272:0–9
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