Classification
333 - Economics of land & energy
338 - Production
106
320 - Political science
19
621 - Applied physics
15
330 - Economics
13
340 - Law
6
363 - Other social problems & services
5
380 - Commerce, communications & transportation
5
610 - Medicine & health
5
304 - Factors affecting social behavior
4
602 - Miscellany
3
658 - General management
3
302 - Social interaction
2
100 - Philosophy & psychology
1
170 - Ethics
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
332 - Financial economics
1
336 - Public finance
1
346 - Private law
1
370 - Education
1
400 - Language
1
600 - Technology
1
630 - Agriculture & related technologies
1
900 - History & geography
1