History 1,481 Social conditions 461 Social aspects 216 Politics and government 214 Race relations 192 Social life and customs 175 Indians of North America 173 Description and travel 142 Motion picture industry 138 Mexican Americans 137 African Americans 136 Ethnic relations 129 Gold mines and mining 126 Gold discoveries 123 Immigrants 114 Ethnic identity 109 Motion pictures 108 Law and legislation 107 Economic conditions 105 History and criticism 102 Emigration and immigration 88 Manners and customs 88 Japanese Americans 85 Political aspects 85 Artists' books 84 Chinese Americans 83 Architecture 81 Political activity 74 Government policy 73 Hispanic Americans 66 Education 64 Art 61 City planning 58 Women 58 Environmental aspects 57 Water-supply 55 Buildings, structures, etc 54 Civil rights 54 Environmental conditions 54 Art collections 53 Art museums 53 Economic aspects 53 Labor unions 51 Minorities 51 Frontier and pioneer life 49 Art, American 46 Law reviews 46 Antiquities 45 Legal status, laws, etc 44 Community life 43 Photograph collections 43 Ecology 42 Geology 42 American literature 41 Employment 41 In literature 41 Management 41 Missions 41 Intellectual life 40 Law 40 Private collections 40 Criticism and interpretation 39 Families 39 Music 39 Travel 38 Water resources development 38 Ethnicity 36 Exhibitions 36 Natural history 36 Migrant agricultural laborers 35 Agricultural laborers 34 Chinese 34 Civilization 34 Police 34 World War, 1939-1945 34 Asian Americans 33 Cultural assimilation 33 Gangs 33 Printing 33 Wine and wine making 33 Agriculture 32 Architecture, Domestic 32 Painting 31 Research 31 Economic history 30 Filipino Americans 30 Motion picture actors and actresses 30 Popular culture 30 Jews 29 Mexicans 29 Motion picture producers and directors 29 Noncitizens 29 Photography, Artistic 29 Religion 29 Overland journeys to the Pacific 28 Homes and haunts 27 Land use 27 Social change 27 Trials, litigation, etc 27 Forced removal and internment, 1942-1945 26