Classification
340 - Law
55
320 - Political science
38
300 - Social sciences
30
330 - Economics
19
363 - Other social problems & services
10
900 - History & geography
8
700 - The arts; fine & decorative arts
5
100 - Philosophy & psychology
4
140 - Specific philosophical schools
3
301 - Sociology & anthropology
3
600 - Technology
3
610 - Medicine & health
3
304 - Factors affecting social behavior
2
333 - Economics of land & energy
2
370 - Education
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
630 - Agriculture & related technologies
1
720 - Architecture
1
791 - Public performances
1
810 - American literature in English
1