Classification
571 - Physiology & related subjects
1,781
616 - Diseases
576
572 - Biochemistry
348
610 - Medicine & health
220
612 - Human physiology
195
579 - Microorganisms, fungi & algae
93
580 - Plants (Botany)
89
615 - Pharmacology & therapeutics
78
570 - Life sciences; biology
70
660 - Chemical engineering
58
611 - Human anatomy, cytology & histology
47
590 - Animals (Zoology)
44
630 - Agriculture & related technologies
37
061 - Organizations in North America
35
614 - Incidence & prevention of disease
33
620 - Engineering & allied operations
21
617 - Surgery & related medical specialties
20
576 - Genetics & evolution
17
577 - Ecology
15
547 - Organic chemistry
14
599 - Mammals
14
618 - Gynecology, obstetrics, pediatrics & geriatrics
14
530 - Physics
12
581 - Specific topics in natural history
11
543 - Analytical chemistry
10
301 - Sociology & anthropology
5
500 - Natural sciences & mathematics
5
546 - Inorganic chemistry
5
613 - Personal health & safety
5
621 - Applied physics
5
573 - Specific physiological systems in animals
4
003 - Systems
3
004 - Data processing & computer science
3
006 - Special computer methods
3
333 - Economics of land & energy
3
541 - Physical chemistry
3
551 - Geology, hydrology & meteorology
3
591 - Specific topics in natural history
3
631 - Techniques, equipment & materials
3
520 - Astronomy & allied sciences
2
560 - Paleontology; paleozoology
2
636 - Animal husbandry
2
670 - Manufacturing
2
001 - Knowledge
1
005 - Computer programming, programs & data
1
057 - Serials in Slavic languages
1
140 - Specific philosophical schools
1
170 - Ethics
1
174 - Occupational ethics
1
300 - Social sciences
1
more ...