Classification
170 - Ethics
3
330 - Economics
360 - Social problems & services; associations
610 - Medicine & health
200 - Religion
2
320 - Political science
2
361 - Social problems & social welfare in general
2
370 - Education
2
658 - General management
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
340 - Law
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
780 - Music
1
900 - History & geography
1