Classification
000 - Computer science, information & general works
320 - Political science
333 - Economics of land & energy
2
363 - Other social problems & services
610 - Medicine & health
658 - General management
140 - Specific philosophical schools
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
330 - Economics
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1