Congresses 647 English language 570 Dictionaries 413 History 388 Economic conditions 343 Study and teaching 278 Management 244 more ... Periodicals 241 Economic forecasting 217 Diseases 208 Handbooks, manuals, etc 203 methods 154 Ecology 151 Economic indicators 149 Addresses, essays, lectures 147 Research 136 Agriculture 131 Economic aspects 129 Economic policy 123 Philosophy 118 Data processing 114 Textbooks for foreign speakers 114 Environmental aspects 112 Education 109 Case studies 108 Mathematical models 108 Social aspects 108 Economics 104 English fiction 99 Problems, exercises, etc 99 less ...