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78:is for topics specifically related to the decade
509:1870s in the United States by state or territory
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242:1870s disestablishments in Pennsylvania
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368:1875 in Pennsylvania
351:1874 in Pennsylvania
334:1873 in Pennsylvania
317:1872 in Pennsylvania
300:1871 in Pennsylvania
283:1870 in Pennsylvania
68:North America portal
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263:(10 C, 3 P)
246:(10 C, 1 P)
503:Categories
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406:(3 C, 4 P)
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76:category
464:(10 C)
440:(4 C)
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287:(3 C)
148:1920s
143:1910s
138:1900s
133:1890s
128:1880s
123:1870s
118:1860s
113:1850s
108:1840s
103:1830s
98:1820s
81:1870s
74:This
211:24th
206:23rd
201:22nd
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179:18th
174:17th
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