Classification
300 - Social sciences
320 - Political science
140 - Specific philosophical schools
9
333 - Economics of land & energy
8
900 - History & geography
7
100 - Philosophy & psychology
6
610 - Medicine & health
6
301 - Sociology & anthropology
3
330 - Economics
3
340 - Law
3
370 - Education
3
200 - Religion
2
304 - Factors affecting social behavior
2
380 - Commerce, communications & transportation
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
581 - Specific topics in natural history
1
600 - Technology
1