Classification
320 - Political science
613
327 - International relations
603
338 - Production
79
306 - Culture & institutions
61
339 - Macroeconomics & related topics
59
303 - Social processes
31
341 - Law of nations
31
304 - Factors affecting social behavior
26
337 - International economics
23
333 - Economics of land & energy
17
363 - Other social problems & services
14
344 - Labor, social, education & cultural law
13
301 - Sociology & anthropology
11
302 - Social interaction
9
340 - Law
8
330 - Economics
7
364 - Criminology
7
900 - History & geography
7
324 - The political process
6
658 - General management
6
909 - World history
6
910 - Geography & travel
6
343 - Military, tax, trade & industrial law
5
355 - Military science
5
361 - Social problems & social welfare in general
5
418 - Standard usage & applied linguistics
5
960 - History of Africa
5
305 - Social groups
4
370 - Education
4
551 - Geology, hydrology & meteorology
4
940 - History of Europe
4
941 - British Isles
4
945 - Italian Peninsula & adjacent islands
4
950 - History of Asia; Far East
4
155 - Differential & developmental psychology
3
200 - Religion
3
323 - Civil & political rights
3
331 - Labor economics
3
509 - Historical, geographic & persons treatment
3
621 - Applied physics
3
956 - Middle East (Near East)
3
973 - United States
3
210 - Philosophy & theory of religion
2
300 - Social sciences
2
345 - Criminal law
2
347 - Civil procedure & courts
2
378 - Higher education
2
519 - Probabilities & applied mathematics
2
610 - Medicine & health
2
629 - Other branches of engineering
2
more ...