Classification
337 - International economics
60
330 - Economics
51
320 - Political science
50
338 - Production
49
343 - Military, tax, trade & industrial law
33
340 - Law
24
341 - Law of nations
24
339 - Macroeconomics & related topics
17
327 - International relations
15
332 - Financial economics
11
304 - Factors affecting social behavior
8
333 - Economics of land & energy
7
331 - Labor economics
6
382 - International commerce
5
306 - Culture & institutions
4
342 - Constitutional & administrative law
4
300 - Social sciences
3
347 - Civil procedure & courts
3
364 - Criminology
3
380 - Commerce, communications & transportation
3
610 - Medicine & health
3
900 - History & geography
3
910 - Geography & travel
3
301 - Sociology & anthropology
2
307 - Communities
2
336 - Public finance
2
345 - Criminal law
2
351 - Public administration
2
361 - Social problems & social welfare in general
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
003 - Systems
1
155 - Differential & developmental psychology
1
158 - Applied psychology
1
303 - Social processes
1
344 - Labor, social, education & cultural law
1
346 - Private law
1
360 - Social problems & services; associations
1
370 - Education
1
378 - Higher education
1
381 - Commerce
1
410 - Linguistics
1
519 - Probabilities & applied mathematics
1
621 - Applied physics
1
628 - Sanitary & municipal engineering
1
641 - Food & drink
1
650 - Management & auxiliary services
1
657 - Accounting
1
658 - General management
1
660 - Chemical engineering
1
more ...