Classification
300 - Social sciences
6
320 - Political science
6
600 - Technology
380 - Commerce, communications & transportation
2
900 - History & geography
2
200 - Religion
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
330 - Economics
1
363 - Other social problems & services
1
370 - Education
1
500 - Natural sciences & mathematics
1