Classification
305 - Social groups
464
306 - Culture & institutions
258
301 - Sociology & anthropology
186
304 - Factors affecting social behavior
140
320 - Political science
98
361 - Social problems & social welfare in general
86
300 - Social sciences
63
307 - Communities
51
614 - Incidence & prevention of disease
27
338 - Production
25
613 - Personal health & safety
21
330 - Economics
19
900 - History & geography
18
302 - Social interaction
17
370 - Education
16
364 - Criminology
15
333 - Economics of land & energy
13
610 - Medicine & health
12
303 - Social processes
11
327 - International relations
10
140 - Specific philosophical schools
8
331 - Labor economics
8
340 - Law
8
155 - Differential & developmental psychology
7
571 - Physiology & related subjects
7
341 - Law of nations
6
372 - Elementary education
5
410 - Linguistics
5
700 - The arts; fine & decorative arts
5
100 - Philosophy & psychology
4
150 - Psychology
4
200 - Religion
4
345 - Criminal law
4
362 - Social welfare problems & services
4
379 - Public policy issues in education
4
551 - Geology, hydrology & meteorology
4
616 - Diseases
4
658 - General management
4
780 - Music
4
339 - Macroeconomics & related topics
3
378 - Higher education
3
576 - Genetics & evolution
3
630 - Agriculture & related technologies
3
174 - Occupational ethics
2
323 - Civil & political rights
2
324 - The political process
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
390 - Customs, etiquette & folklore
2
400 - Language
2
more ...