History 13 Jerusalem 6 English; 4 Jews 4 Astrophysics; Descriptive astronomy 3 Fishes 3 International relations 3 Metals 3 Parasitology 3 Physics 3 Religion 3 Soil Science 3 Women 3 soil classification 3 Agrochemistry - soils - USSR 2 Atmosphere 2 Biochemistry 2 British 2 Climatology 2 Congresses 2 Crusades 2 Crustacean and related animals-- Invertebrate Zoology 2 Differential equations-- Analysis-- Mathematics 2 English drama 2 Ethnic relations 2 Expedition - Antarctica 2 Gender in conflict management 2 Identity (Psychology) 2 Insects (Entomology) 2 Iranians 2