History 12,409 Politics and government 3,448 Slavery 2,021 African Americans 1,402 Biography 1,397 Emigration and immigration 1,153 Periodicals 1,068 more ... Jews 1,050 Societies, etc 1,019 Genealogy 980 Description and travel 851 Social conditions 835 Sources 828 Foreign relations 825 Regimental histories 785 Presidents 722 Race relations 704 Social life and customs 680 Bibliography 614 Campaigns 561 Economic conditions 506 Minorities 490 Personal narratives 483 Immigrants 455 Germans 434 Registers of births, etc 424 Indians of North America 411 Antislavery movements 405 Civilization 401 Education 399 Civil rights 386 Women 352 Legislators 339 Railroads 338 Religious life 314 Causes 303 Communism 298 German Americans 285 World War, 1939-1945 269 Tariff 268 less ...