History 1.027 Politics and government 440 Biography 184 Foreign relations 184 Economic conditions 183 History and criticism 169 German literature 158 World War, 1939-1945 116 Social conditions 103 Romanticism 92 World War, 1914-1918 88 Economic policy 85 Economic aspects 83 Periodicals 81 Agriculture 80 Jews 72 Socialism 60 Intellectual life 55 Sources 55 Education 54 Commerce 50 National socialism 50 Working class 46 Industries 45 Description and travel 42 Fiction 39 Geology 38 Criticism 36 Exhibitions 36 Theater 36