Classification
301 - Sociology & anthropology
320 - Political science
300 - Social sciences
12
900 - History & geography
7
100 - Philosophy & psychology
5
330 - Economics
5
333 - Economics of land & energy
4
140 - Specific philosophical schools
3
340 - Law
3
370 - Education
3
380 - Commerce, communications & transportation
3
700 - The arts; fine & decorative arts
3
200 - Religion
2
350 - Public administration & military science
2
610 - Medicine & health
2
170 - Ethics
1
304 - Factors affecting social behavior
1
336 - Public finance
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
600 - Technology
1
630 - Agriculture & related technologies
1
657 - Accounting
1