History 90 Polish Americans 29 Ethnic groups 27 Census records 22 Sources 17 African Americans 15 Societies, etc 15 more ... Latvian Americans 13 German Americans 12 Biography 11 Histoire 11 Bibliography 10 Frontier and pioneer life 10 Periodicals 10 Religious life 10 Germans 9 History, Local 9 Polish people 9 Social conditions 9 Archives 8 Dutch 8 Church buildings 7 Education 7 Lutheran Church 7 Genealogy 6 Generals 6 Jews 6 Latvians 6 Minorities 6 Race relations 6 Registers of births, etc 6 Description and travel 5 Directories 5 Greek Americans 5 Indians of North America 5 Labor 5 Labor movement 5 Officers 5 Amerykanie pochodzenia polskiego 4 Américains d'origine lettone 4 less ...