Classification
330 - Economics
480
338 - Production
125
331 - Labor economics
36
333 - Economics of land & energy
36
332 - Financial economics
24
337 - International economics
23
339 - Macroeconomics & related topics
23
363 - Other social problems & services
22
306 - Culture & institutions
15
658 - General management
12
382 - International commerce
11
336 - Public finance
8
364 - Criminology
6
304 - Factors affecting social behavior
4
320 - Political science
4
380 - Commerce, communications & transportation
4
174 - Occupational ethics
3
303 - Social processes
2
340 - Law
2
343 - Military, tax, trade & industrial law
2
360 - Social problems & services; associations
2
381 - Commerce
2
600 - Technology
2
639 - Hunting, fishing & conservation
2
100 - Philosophy & psychology
1
171 - Ethical systems
1
261 - Social theology
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
302 - Social interaction
1
307 - Communities
1
321 - Systems of governments & states
1
346 - Private law
1
350 - Public administration & military science
1
355 - Military science
1
362 - Social welfare problems & services
1
370 - Education
1
371 - Schools & their activities; special education
1
378 - Higher education
1
379 - Public policy issues in education
1
384 - Communications; telecommunication
1
388 - Transportation; ground transportation
1
570 - Life sciences; biology
1
577 - Ecology
1
610 - Medicine & health
1
622 - Mining & related operations
1
706 - Organizations & management
1
780 - Music
1
910 - Geography & travel
1
more ...