History 79 Census records 22 Polish Americans 18 Sources 17 African Americans 15 Ethnic groups 15 Biography 11 more ... Bibliography 10 Periodicals 10 History, Local 9 Social conditions 9 Archives 8 Dutch 8 Frontier and pioneer life 8 Education 7 Histoire 7 Societies, etc 7 Genealogy 6 Generals 6 Jews 6 Minorities 6 Polish people 6 Race relations 6 Registers of births, etc 6 Description and travel 5 Directories 5 Indians of North America 5 Labor 5 Officers 5 Finnish Americans 4 Indexes 4 Indians 4 Legislators 4 Religious life 4 Ukrainian Americans 4 Arab Americans 3 Archival resources 3 Catalogs 3 Census 3 Church buildings 3 less ...