International cooperation 267 Cooperation 145 Agriculture, Cooperative 105 Cooperative societies 79 Library cooperation 79 Congresses 60 History 47 Education, Cooperative 46 Agriculture 34 Housing, Cooperative 32 Research 31 Science 30 University cooperation 29 Technology 28 Periodicals 24 Economic conditions 23 Economic policy 20 Libraries 20 Case studies 18 Economic aspects 17 European cooperation 17 Universities and colleges 17 Academic libraries 16 Intellectual cooperation 16 Producer cooperatives 16 Management 15 Politics and government 15 Bibliography 13 Environmental policy 13 International economic relations 13