Classification
000 - Computer science, information & general works
320 - Political science
330 - Economics
610 - Medicine & health
658 - General management
333 - Economics of land & energy
2
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
370 - Education
1
380 - Commerce, communications & transportation
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
600 - Technology
1
650 - Management & auxiliary services
1