Classification
610 - Medicine & health
3,022
616 - Diseases
365
615 - Pharmacology & therapeutics
132
617 - Surgery & related medical specialties
105
612 - Human physiology
86
614 - Incidence & prevention of disease
76
570 - Life sciences; biology
61
613 - Personal health & safety
49
150 - Psychology
36
611 - Human anatomy, cytology & histology
35
344 - Labor, social, education & cultural law
34
618 - Gynecology, obstetrics, pediatrics & geriatrics
30
579 - Microorganisms, fungi & algae
25
572 - Biochemistry
24
540 - Chemistry & allied sciences
19
301 - Sociology & anthropology
17
571 - Physiology & related subjects
17
155 - Differential & developmental psychology
15
599 - Mammals
13
519 - Probabilities & applied mathematics
12
330 - Economics
11
362 - Social welfare problems & services
11
502 - Miscellany
11
306 - Culture & institutions
10
580 - Plants (Botany)
10
338 - Production
9
530 - Physics
9
004 - Data processing & computer science
8
174 - Occupational ethics
8
543 - Analytical chemistry
8
590 - Animals (Zoology)
8
006 - Special computer methods
7
302 - Social interaction
7
363 - Other social problems & services
7
515 - Analysis
7
620 - Engineering & allied operations
7
353 - Specific fields of public administration
6
361 - Social problems & social welfare in general
6
370 - Education
6
547 - Organic chemistry
6
551 - Geology, hydrology & meteorology
6
100 - Philosophy & psychology
5
170 - Ethics
5
300 - Social sciences
5
320 - Political science
5
333 - Economics of land & energy
5
541 - Physical chemistry
5
621 - Applied physics
5
629 - Other branches of engineering
5
658 - General management
5
more ...