Classification
301 - Sociology & anthropology
320 - Political science
300 - Social sciences
19
900 - History & geography
8
200 - Religion
7
700 - The arts; fine & decorative arts
6
304 - Factors affecting social behavior
5
330 - Economics
5
100 - Philosophy & psychology
4
333 - Economics of land & energy
4
363 - Other social problems & services
4
140 - Specific philosophical schools
3
340 - Law
3
400 - Language
3
410 - Linguistics
3
000 - Computer science, information & general works
2
170 - Ethics
2
380 - Commerce, communications & transportation
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
336 - Public finance
1
350 - Public administration & military science
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
657 - Accounting
1
780 - Music
1