Classification
330 - Economics
7,073
333 - Economics of land & energy
5,029
320 - Political science
3,881
370 - Education
3,054
363 - Other social problems & services
2,556
304 - Factors affecting social behavior
2,482
610 - Medicine & health
2,482
380 - Commerce, communications & transportation
2,043
600 - Technology
1,740
336 - Public finance
1,383
630 - Agriculture & related technologies
807
340 - Law
7