Classification
330 - Economics
320 - Political science
32
333 - Economics of land & energy
6
900 - History & geography
4
370 - Education
3
340 - Law
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
200 - Religion
1
300 - Social sciences
1
338 - Production
1
363 - Other social problems & services
1
400 - Language
1
610 - Medicine & health
1
620 - Engineering & allied operations
1