Physics Physique 39 Natuurkunde 32 33.00 physics: general 13 Chemistry 6 Mathematics 6 Physik 6 Zeitschrift 6 Condensed matter 5 Biophysics 4 Chemistry, Physical and theoretical 4 History 4 Research 4 Statistical physics 4 Chimie physique et the ́orique 3 Data processing 3 E ́tude et enseignement 3 Engineering 3 Fysische chemie 3 Mathematical physics 3 Pe ́riodiques 3 Philosophy 3 Science 3 Solids 3 Study and teaching 3 Toepassingen 3 33.02 philosophy and theory of physics 2 33.50 physics of elementary particles and fields: general 2 33.60 condensed matter: general 2 Biology 2