Classification
330 - Economics
249
320 - Political science
19
610 - Medicine & health
11
900 - History & geography
11
333 - Economics of land & energy
9
800 - Literature & rhetoric
7
297 - Islam, Babism & Bahai Faith
6
500 - Natural sciences & mathematics
4
140 - Specific philosophical schools
3
304 - Factors affecting social behavior
3
300 - Social sciences
2
301 - Sociology & anthropology
2
370 - Education
2
380 - Commerce, communications & transportation
2
200 - Religion
1
303 - Social processes
1
336 - Public finance
1
363 - Other social problems & services
1
600 - Technology
1
630 - Agriculture & related technologies
1