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