Classification
330 - Economics
29
320 - Political science
3
333 - Economics of land & energy
3
363 - Other social problems & services
3
000 - Computer science, information & general works
2
200 - Religion
2
290 - Other religions
2
581 - Specific topics in natural history
2
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
325 - International migration & colonization
1
332 - Financial economics
1
338 - Production
1
551 - Geology, hydrology & meteorology
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1