Sciences Science 41 Natuurwetenschappen 9 Exacte wetenschappen 7 Technology 7 E ́tude et enseignement 5 History 5 Research 5 Study and teaching 5 Technologie 5 30.00 exact sciences: general 4 Histoire 4 Pe ́riodiques 4 Publications pe ́riodiques 4 Social aspects 4 Aspect social 3 Biology 3 Mathematics 3 Natural history 3 Naturwissenschaften 3 Onderwijs 3 Zeitschrift 3 history 3 Aspect moral 2 Earth sciences 2 Ethics 2 Geschichte 2 Hebdomadaires 2 History of Medicine 2 Medicine 2