Classification
370 - Education
9
304 - Factors affecting social behavior
5
610 - Medicine & health
5
320 - Political science
4
330 - Economics
4
336 - Public finance
2
340 - Law
2
600 - Technology
2
780 - Music
2
301 - Sociology & anthropology
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
900 - History & geography
1