Classification
363 - Other social problems & services
3
616 - Diseases
3
539 - Modern physics
2
615 - Pharmacology & therapeutics
2
628 - Sanitary & municipal engineering
2
001 - Knowledge
1
005 - Computer programming, programs & data
1
300 - Social sciences
1
306 - Culture & institutions
1
510 - Mathematics
1
551 - Geology, hydrology & meteorology
1
572 - Biochemistry
1
610 - Medicine & health
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
621 - Applied physics
1