History 1,375 Social conditions 417 Politics and government 195 Social aspects 195 Race relations 169 Indians of North America 164 Social life and customs 164 Description and travel 139 Motion picture industry 132 Gold mines and mining 127 Mexican Americans 126 African Americans 119 Ethnic relations 119 Gold discoveries 119 Immigrants 105 Motion pictures 104 Law and legislation 102 Ethnic identity 99 Economic conditions 98 History and criticism 97 Manners and customs 91 Artists' books 85 Emigration and immigration 82 Architecture 79 Japanese Americans 75 Chinese Americans 73 Political aspects 73 Government policy 69 Political activity 65 Education 63 Art 62 Hispanic Americans 56 Water-supply 56 Women 55 Art collections 54 Art museums 54 Buildings, structures, etc 54 Environmental aspects 52 City planning 51 Environmental conditions 50 Frontier and pioneer life 50 Civil rights 49 Minorities 49 Economic aspects 47 Law reviews 46 Art, American 45 Labor unions 45 Photograph collections 43 Antiquities 42 Community life 42 Geology 42 Legal status, laws, etc 42 Ecology 41 Employment 41 Private collections 41 Families 40 Law 40 Management 39 Missions 39 Water resources development 39 American literature 38 Criticism and interpretation 38 In literature 38 Intellectual life 37 Music 37 Ethnicity 36 Exhibitions 36 Natural history 36 Travel 36 Civilization 35 World War, 1939-1945 34 Printing 33 Chinese 32 Agricultural laborers 31 Architecture, Domestic 31 Gangs 31 Painting 31 Economic history 30 Jews 30 Migrant agricultural laborers 30 Photography, Artistic 30 Police 30 Agriculture 29 Cultural assimilation 29 Noncitizens 29 Research 29 Asian Americans 28 Overland journeys to the Pacific 28 Religion 28 Filipino Americans 27 Homes and haunts 27 Motion picture actors and actresses 27 Popular culture 27 Mexicans 26 Motion picture producers and directors 26 Forced removal and internment, 1942-1945 25 Land use 25 Social change 25 Womyn 25 Employees 24