Classification
610 - Medicine & health
2,250
616 - Diseases
229
615 - Pharmacology & therapeutics
106
617 - Surgery & related medical specialties
90
614 - Incidence & prevention of disease
50
570 - Life sciences; biology
42
613 - Personal health & safety
41
612 - Human physiology
35
150 - Psychology
28
344 - Labor, social, education & cultural law
27
611 - Human anatomy, cytology & histology
26
579 - Microorganisms, fungi & algae
24
618 - Gynecology, obstetrics, pediatrics & geriatrics
21
540 - Chemistry & allied sciences
15
572 - Biochemistry
14
301 - Sociology & anthropology
11
571 - Physiology & related subjects
11
330 - Economics
9
580 - Plants (Botany)
9
306 - Culture & institutions
8
530 - Physics
8
599 - Mammals
8
155 - Differential & developmental psychology
7
590 - Animals (Zoology)
7
302 - Social interaction
6
361 - Social problems & social welfare in general
6
370 - Education
6
515 - Analysis
6
174 - Occupational ethics
5
547 - Organic chemistry
5
620 - Engineering & allied operations
5
320 - Political science
4
340 - Law
4
353 - Specific fields of public administration
4
500 - Natural sciences & mathematics
4
543 - Analytical chemistry
4
338 - Production
3
502 - Miscellany
3
519 - Probabilities & applied mathematics
3
541 - Physical chemistry
3
576 - Genetics & evolution
3
658 - General management
3
660 - Chemical engineering
3
004 - Data processing & computer science
2
006 - Special computer methods
2
120 - Epistemology, causation & humankind
2
160 - Logic
2
170 - Ethics
2
362 - Social welfare problems & services
2
520 - Astronomy & allied sciences
2
more ...