Classification
320 - Political science
330 - Economics
802
300 - Social sciences
155
900 - History & geography
134
340 - Law
130
333 - Economics of land & energy
62
630 - Agriculture & related technologies
31
700 - The arts; fine & decorative arts
30
100 - Philosophy & psychology
24
304 - Factors affecting social behavior
24
610 - Medicine & health
23
600 - Technology
21
363 - Other social problems & services
17
370 - Education
17
380 - Commerce, communications & transportation
17
000 - Computer science, information & general works
6
140 - Specific philosophical schools
6
170 - Ethics
5
200 - Religion
5
301 - Sociology & anthropology
5
576 - Genetics & evolution
5
800 - Literature & rhetoric
4
336 - Public finance
3
500 - Natural sciences & mathematics
3
780 - Music
2
160 - Logic
1
361 - Social problems & social welfare in general
1
382 - International commerce
1
530 - Physics
1
720 - Architecture
1
920 - Biography, genealogy & insignia
1