Classification
330 - Economics
2
350 - Public administration & military science
363 - Other social problems & services
2
581 - Specific topics in natural history
600 - Technology
2
610 - Medicine & health
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
320 - Political science
1
333 - Economics of land & energy
1
340 - Law
1
576 - Genetics & evolution
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1