Classification
320 - Political science
330 - Economics
551 - Geology, hydrology & meteorology
610 - Medicine & health
333 - Economics of land & energy
9
600 - Technology
8
363 - Other social problems & services
7
700 - The arts; fine & decorative arts
7
000 - Computer science, information & general works
4
380 - Commerce, communications & transportation
4
581 - Specific topics in natural history
4
900 - History & geography
4
620 - Engineering & allied operations
3
200 - Religion
2
304 - Factors affecting social behavior
2
370 - Education
2
630 - Agriculture & related technologies
2
658 - General management
2
720 - Architecture
2
100 - Philosophy & psychology
1
360 - Social problems & services; associations
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1