Politics and government 86 History 49 Economic conditions 30 Foreign relations 23 Economic policy 20 Social conditions 17 Congresses 16 German literature 16 Research 16 Education 15 History and criticism 15 Biography 13 Employee participation 12 Industrial relations 11 Management 11 Periodicals 11 Commerce 10 Law and legislation 10 Agriculture 9 Case studies 9 Education and state 9 World politics 9 City planning 8 Economic aspects 8 Foreign economic relations 8 Industrial management 8 Monetary policy 8 Political parties 8 Alien labor 7 Bibliography 7