Periodicals 15 Business -- 2 Economic aspects -- 2 Periodicals -- 2 Research 2 Research -- 2 Study and teaching -- 2 more ... Adolescence -- 1 Agricultural engineering 1 Agricultural industries -- 1 Agriculture -- 1 Astronomy -- 1 Business enterprises -- 1 Commerce 1 Commerce -- 1 Economic aspects 1 Economic conditions 1 Economic conditions -- 1 Economic history -- 1 Economic policy 1 Education 1 Education -- 1 English language -- 1 Entrepreneurship -- 1 Environmental sciences 1 Foreign speakers 1 High technology industries -- 1 Humanities 1 IBM microcomputers 1 Industrial engineering -- 1 less ...