History 45 English literature 37 Literature 35 Physiology 33 Novel 32 American drama 31 English fiction 31 Philosophy 27 Chemistry 25 Religion 24 Drama 23 Psychology 23 Plant cell 22 Detective and mystery stories, English 20 Hinduism 20 Literature & Fiction 20 Physics 20 metabolism 20 Mass media 19 Morphology 18 American 17 Economic growth and development-- Economic Planning 17 Education 17 Photosynthesis 17 Reproduction 17 Criticism 16 morphology 16 Clinical psychology 15 Psychology, Clinical 15 History and criticism 14