Classification
333 - Economics of land & energy
370 - Education
320 - Political science
16
100 - Philosophy & psychology
9
300 - Social sciences
8
900 - History & geography
8
140 - Specific philosophical schools
4
330 - Economics
4
340 - Law
3
700 - The arts; fine & decorative arts
3
363 - Other social problems & services
2
400 - Language
2
500 - Natural sciences & mathematics
2
610 - Medicine & health
2
000 - Computer science, information & general works
1
170 - Ethics
1
200 - Religion
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
657 - Accounting
1