Classification
900 - History & geography
320 - Political science
2,134
330 - Economics
2,122
300 - Social sciences
245
576 - Genetics & evolution
233
340 - Law
168
700 - The arts; fine & decorative arts
89
630 - Agriculture & related technologies
25
800 - Literature & rhetoric
18
200 - Religion
14
370 - Education
13
100 - Philosophy & psychology
12
170 - Ethics
9
610 - Medicine & health
6
160 - Logic
5
600 - Technology
5
720 - Architecture
5
333 - Economics of land & energy
4
400 - Language
4
140 - Specific philosophical schools
3
301 - Sociology & anthropology
3
304 - Factors affecting social behavior
3
620 - Engineering & allied operations
3
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
940 - History of Europe
2
943 - Central Europe; Germany
2
323 - Civil & political rights
1
343 - Military, tax, trade & industrial law
1
350 - Public administration & military science
1
354 - Administration of economy & environment
1
355 - Military science
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
500 - Natural sciences & mathematics
1
780 - Music
1
820 - English & Old English literatures
1
832 - German drama
1
920 - Biography, genealogy & insignia
1
941 - British Isles
1
973 - United States
1