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1880 in the United States - Wikipedia
U.S. Timeline, The 1880's - America's Best History
1880 Overview - History - U.S. Census Bureau
Search Census Records Online and Other Resources
United States Census, 1880 - FamilySearch
1880 United States census - Wikipedia
1880 Census: Volume 1. Statistics of the Population
1880 United States Federal Census - Ancestry
Statistical Abstract of the United States: 1880 - Census.gov
United States Census 1880 - FamilySearch