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This category has the following 12 subcategories, out of 12 total.
45:
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15:
59:
424:
408:1820s natural disasters in the United States
425:
187:
13:
194:
186:
14:
464:
340:1820s Atlantic hurricane seasons
18:
453:19th-century natural disasters
1:
7:
448:Natural disasters by decade
10:
469:
31:
443:1820s in the environment
320:1829 natural disasters
303:1828 natural disasters
286:1827 natural disasters
269:1826 natural disasters
256:1825 natural disasters
239:1824 natural disasters
226:1822 natural disasters
209:1821 natural disasters
49:, i.e. in the years
364:1820s earthquakes
39:natural disasters
460:
438:1820s in science
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433:1820s disasters
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26:History portal
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384:1820s floods
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427:Categories
324:(1 C, 1 P)
260:(1 C, 2 P)
213:(1 C, 1 P)
34:category
44:decade
42:in the
36:is for
412:(2 C)
388:(5 P)
368:(4 C)
344:(3 P)
307:(1 C)
290:(1 C)
273:(1 P)
243:(2 P)
230:(1 C)
115:1870s
110:1860s
105:1850s
100:1840s
95:1830s
90:1820s
85:1810s
80:1800s
75:1790s
70:1780s
65:1770s
46:1820s
32:This
178:24th
173:23rd
168:22nd
163:21st
158:20th
152:19th
146:18th
141:17th
136:16th
131:15th
126:14th
55:1829
51:1820
198:0–9
53:to
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397:U
377:F
353:E
333:A
57:.
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