History 1,401 Social conditions 421 Politics and government 212 Social aspects 209 Race relations 178 Indians of North America 164 Social life and customs 161 Motion picture industry 137 Description and travel 134 Mexican Americans 128 African Americans 126 Gold mines and mining 125 Ethnic relations 121 Gold discoveries 121 Motion pictures 107 Law and legislation 106 Economic conditions 102 Immigrants 100 Ethnic identity 98 History and criticism 93 Artists' books 89 Emigration and immigration 88 Architecture 82 Japanese Americans 82 Political aspects 81 Chinese Americans 78 Manners and customs 76 Government policy 72 Political activity 72 Art 68 Hispanic Americans 66 City planning 62 Education 61 Women 57 Art collections 56 Art museums 54 Buildings, structures, etc 54 Civil rights 53 Law reviews 52 Water-supply 52 Minorities 51 Environmental conditions 49 Environmental aspects 48 Labor unions 48 Economic aspects 46 Art, American 45 Law 45 Frontier and pioneer life 44 Private collections 43 Geology 42 Legal status, laws, etc 42 Photograph collections 42 Employment 41 Community life 40 Families 40 Missions 40 Management 39 Natural history 39 Water resources development 39 Antiquities 38 American literature 36 Chinese 36 Ecology 36 Exhibitions 36 Music 36 Civilization 35 Intellectual life 35 World War, 1939-1945 35 Criticism and interpretation 34 Asian Americans 33 In literature 33 Migrant agricultural laborers 33 Printing 33 Research 33 Agricultural laborers 32 Architecture, Domestic 32 Cultural assimilation 32 Ethnicity 32 Gangs 32 Noncitizens 32 Police 31 Religion 31 Travel 31 Agriculture 30 Jews 30 Painting 30 Wine and wine making 30 Popular culture 29 Filipino Americans 28 Motion picture actors and actresses 28 Photography, Artistic 28 Forced removal and internment, 1942-1945 26 Mexicans 26 Motion picture producers and directors 26 Overland journeys to the Pacific 26 Social change 26 Womyn 26 Influence 25 Korean Americans 25 Land use 25