Classification
340 - Law
363 - Other social problems & services
330 - Economics
4
140 - Specific philosophical schools
3
333 - Economics of land & energy
3
581 - Specific topics in natural history
3
700 - The arts; fine & decorative arts
3
320 - Political science
2
380 - Commerce, communications & transportation
2
100 - Philosophy & psychology
1
170 - Ethics
1
300 - Social sciences
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
720 - Architecture
1
900 - History & geography
1