Classification
320 - Political science
163
330 - Economics
163
900 - History & geography
34
300 - Social sciences
24
820 - English & Old English literatures
16
340 - Law
13
576 - Genetics & evolution
9
630 - Agriculture & related technologies
4
909 - World history
3
325 - International migration & colonization
2
305 - Social groups
1
380 - Commerce, communications & transportation
1
640 - Home & family management
1
700 - The arts; fine & decorative arts
1
940 - History of Europe
1
966 - West Africa & offshore islands
1
972 - Middle America; Mexico
1
995 - Melanesia; New Guinea
1