History 201 Prices-- Production economics 201 Economics 183 Africa 125 Literature 75 Agricultural economics 71 Politics and government 59 India 56 BEILSTEINS HANDBUCH DER ORGANISCHEN CHEMIE 52 Marketing 49 Microbiology, microorganisms 47 Organic chemistry 44 Prices 44 Prime ministers 44 Biography 42 Pricing 39 South Africa 39 Management 38 Finance 35 Novel 35 Commerce 33 Economic development 33 Fisheries-- Fishing 33 Money 33 Women 33 Taxonomy of animals in ancient India-- British India 32 Analytic chemistry 31 History and criticism 31 Management Information Systems 30 Oceanography 30