Classification
330 - Economics
320 - Political science
346
340 - Law
83
300 - Social sciences
52
630 - Agriculture & related technologies
21
900 - History & geography
5
380 - Commerce, communications & transportation
4
333 - Economics of land & energy
2
576 - Genetics & evolution
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
200 - Religion
1
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
381 - Commerce
1
382 - International commerce
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
780 - Music
1
800 - Literature & rhetoric
1