Classification
301 - Sociology & anthropology
540 - Chemistry & allied sciences
600 - Technology
620 - Engineering & allied operations
3
300 - Social sciences
2
363 - Other social problems & services
2
100 - Philosophy & psychology
1
330 - Economics
1
333 - Economics of land & energy
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1