Classification
330 - Economics
17
320 - Political science
11
333 - Economics of land & energy
5
410 - Linguistics
4
340 - Law
3
301 - Sociology & anthropology
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
900 - History & geography
2
304 - Factors affecting social behavior
1
336 - Public finance
1
610 - Medicine & health
1