Classification
330 - Economics
10
320 - Political science
7
304 - Factors affecting social behavior
5
610 - Medicine & health
5
780 - Music
5
410 - Linguistics
3
336 - Public finance
2
340 - Law
2
363 - Other social problems & services
2
400 - Language
2
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
370 - Education
1
380 - Commerce, communications & transportation
1
600 - Technology
1
900 - History & geography
1