Hormones 194 Physiology 87 Biochemistry 80 Koran 79 History 66 Koran and Hadith 48 Biochemistry-- Biology 39 Philosophy 35 Literature 33 Education 31 Psychology 30 History and criticism 29 Islam 28 Nutrition 28 Koran--Islamic sacred books & scriptures--Religion 27 Criticism and interpretation 25 English literature 25 Biography 24 Criticism 24 Economics 24 PhD Theses 24 Sociology 24 Endocrinology 23 Microbiology 23 Religion 23 Enzymes 22 United States 22 Chemistry 21 American literature 20 Hormone Research 20