Classification
320 - Political science
49
304 - Factors affecting social behavior
32
300 - Social sciences
19
301 - Sociology & anthropology
10
340 - Law
8
370 - Education
8
140 - Specific philosophical schools
5
900 - History & geography
5
200 - Religion
3
600 - Technology
3
330 - Economics
2
333 - Economics of land & energy
2
360 - Social problems & services; associations
2
361 - Social problems & social welfare in general
2
380 - Commerce, communications & transportation
2
720 - Architecture
2
100 - Philosophy & psychology
1
170 - Ethics
1
363 - Other social problems & services
1
400 - Language
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1