Classification
301 - Sociology & anthropology
300 - Social sciences
11
900 - History & geography
11
100 - Philosophy & psychology
5
610 - Medicine & health
5
140 - Specific philosophical schools
3
320 - Political science
3
333 - Economics of land & energy
3
600 - Technology
2
170 - Ethics
1
200 - Religion
1
304 - Factors affecting social behavior
1
330 - Economics
1
340 - Law
1
363 - Other social problems & services
1
364 - Criminology
1
370 - Education
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1
590 - Animals (Zoology)
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1