Classification
610 - Medicine & health
300 - Social sciences
9
900 - History & geography
8
320 - Political science
7
301 - Sociology & anthropology
5
333 - Economics of land & energy
5
140 - Specific philosophical schools
4
100 - Philosophy & psychology
3
297 - Islam, Babism & Bahai Faith
3
330 - Economics
3
340 - Law
3
800 - Literature & rhetoric
3
370 - Education
2
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
364 - Criminology
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
534 - Sound & related vibrations
1
570 - Life sciences; biology
1
581 - Specific topics in natural history
1
590 - Animals (Zoology)
1
600 - Technology
1