History 389 Social conditions 133 African Americans 79 Economic conditions 66 Indians of North America 64 Race relations 64 Ethnic relations 53 mere ... Politics and government 52 Social life and customs 51 Immigrants 43 Antiquities 40 Economic history 33 Geology 29 Urban renewal 26 Manners and customs 25 Social aspects 25 Art 22 Civil rights 22 Private collections 20 Education 17 Law and legislation 17 Racism 17 Law reviews 16 Description and travel 15 Ojibwa Indians 15 Buildings, structures, etc 14 In literature 14 Architecture 13 Art museums 13 Frontier and pioneer life 13 mindre ...