Classification
330 - Economics
19
320 - Political science
9
333 - Economics of land & energy
6
900 - History & geography
4
340 - Law
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
336 - Public finance
1
350 - Public administration & military science
1
363 - Other social problems & services
1
400 - Language
1
576 - Genetics & evolution
1
600 - Technology
1
610 - Medicine & health
1