Classification
900 - History & geography
330 - Economics
1,419
320 - Political science
1,397
300 - Social sciences
423
576 - Genetics & evolution
320
340 - Law
132
700 - The arts; fine & decorative arts
21
333 - Economics of land & energy
12
100 - Philosophy & psychology
11
336 - Public finance
6
000 - Computer science, information & general works
5
380 - Commerce, communications & transportation
5
600 - Technology
5
610 - Medicine & health
5
630 - Agriculture & related technologies
5
301 - Sociology & anthropology
4
363 - Other social problems & services
4
620 - Engineering & allied operations
4
200 - Religion
3
500 - Natural sciences & mathematics
3
581 - Specific topics in natural history
3
304 - Factors affecting social behavior
2
350 - Public administration & military science
2
140 - Specific philosophical schools
1
170 - Ethics
1
274 - History of Christianity in Europe
1
370 - Education
1
400 - Language
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
657 - Accounting
1