History 396 History and criticism 142 Genetics 108 Philosophy 106 Heredity 105 Politics and government 84 English literature 75 HEREDITY 64 Social conditions 54 Criticism and interpretation 53 Literature 52 Herbs 50 Genetics-- Heredity 44 Women 40 Social aspects 36 Criticism 33 Biology 32 Dissertations, Academic (Ph.D) 30 English poetry 30 Sociology 27 Biography 26 Foreign relations 26 Religion 26 Mathematics 25 Civilization 23 Medicinal plants 23 Chromosomes 22 Social sciences 22 heredity 22 Historiography 21