Classification
200 - Religion
300 - Social sciences
320 - Political science
900 - History & geography
380 - Commerce, communications & transportation
3
100 - Philosophy & psychology
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
1
330 - Economics
1
340 - Law
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
370 - Education
1
600 - Technology
1
780 - Music
1