Classification
380 - Commerce, communications & transportation
630 - Agriculture & related technologies
58
363 - Other social problems & services
15
333 - Economics of land & energy
13
330 - Economics
10
320 - Political science
7
600 - Technology
3
304 - Factors affecting social behavior
2
340 - Law
2
610 - Medicine & health
2
336 - Public finance
1
370 - Education
1
576 - Genetics & evolution
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1