Classification
140 - Specific philosophical schools
2
300 - Social sciences
3
304 - Factors affecting social behavior
31
307 - Communities
71
320 - Political science
2
330 - Economics
3
333 - Economics of land & energy
4
344 - Labor, social, education & cultural law
1
363 - Other social problems & services
2
500 - Natural sciences & mathematics
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
3
629 - Other branches of engineering
1
696 - Utilities
3
700 - The arts; fine & decorative arts
2
710 - Civic & landscape art
4
720 - Architecture
3
740 - Drawing & decorative arts
1
910 - Geography & travel
17