History 596 Social conditions 136 Description and travel 109 Gold mines and mining 94 Artists' books 85 Gold discoveries 85 Politics and government 82 more ... Architecture 74 Social life and customs 72 Indians of North America 68 Social aspects 63 Art 58 Motion picture industry 58 Art museums 54 History and criticism 54 Race relations 53 Art collections 52 Buildings, structures, etc 49 Manners and customs 47 Mexican Americans 46 Motion pictures 46 Photograph collections 42 Ethnic relations 41 African Americans 40 Chinese Americans 39 Economic conditions 39 Art, American 38 Private collections 38 Japanese Americans 37 Exhibitions 34 less ...