Classification
333 - Economics of land & energy
350 - Public administration & military science
900 - History & geography
320 - Political science
3
610 - Medicine & health
3
120 - Epistemology, causation & humankind
2
300 - Social sciences
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
100 - Philosophy & psychology
1
330 - Economics
1
370 - Education
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
600 - Technology
1