History 509 Biography 233 Politics and government 190 Presidents 174 English fiction 134 Foreign relations 97 Case studies 62 Women 62 Social conditions 59 English language 58 Management 56 Universities and colleges 55 Education 53 Singers 51 Juvenile literature 50 Motion picture actors and actresses 50 Economic conditions 45 Social life and customs 45 Architecture, Domestic 44 Social aspects 43 Investments 42 Presidents' spouses 42 United States 42 Handbooks, manuals, etc 41 Description and travel 39 Industrial management 38 Pictorial works 37 Rock musicians 37 World War, 1939-1945 37 Economic policy 36