Classification
320 - Political science
370 - Education
330 - Economics
17
340 - Law
13
380 - Commerce, communications & transportation
5
000 - Computer science, information & general works
4
333 - Economics of land & energy
4
600 - Technology
4
700 - The arts; fine & decorative arts
4
363 - Other social problems & services
3
551 - Geology, hydrology & meteorology
3
610 - Medicine & health
3
900 - History & geography
3
200 - Religion
2
400 - Language
2
720 - Architecture
2
100 - Philosophy & psychology
1
170 - Ethics
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
410 - Linguistics
1
630 - Agriculture & related technologies
1