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This category has the following 15 subcategories, out of 15 total.
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474:Pages in category "20th-century scientists"
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154:20th-century scientists by nationality
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117:. Scientists can also be browsed
19:Scientists by period of activity
128:Category:20th-century inventors
458:20th-century social scientists
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311:20th-century earth scientists
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376:20th-century naturalists
239:20th-century astronomers
222:20th-century agronomists
564:20th century in science
417:20th-century physicists
400:20th-century physicians
263:20th-century biologists
106:This category contains
328:20th-century engineers
579:20th-century scholars
574:Scientists by century
540:David Eduard van Dijk
287:20th-century chemists
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332:(55 C, 77 P)
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86:18th century
82:17th century
78:16th century
74:15th century
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58:11th century
54:10th century
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462:(8 C, 21 P)
421:(2 C, 48 P)
356:(2 C, 23 P)
243:(1 C, 63 P)
50:9th century
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558:Categories
315:(7 C, 4 P)
126:See also:
109:scientists
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