Classification
320 - Political science
620 - Engineering & allied operations
600 - Technology
7
333 - Economics of land & energy
5
363 - Other social problems & services
5
900 - History & geography
5
330 - Economics
4
100 - Philosophy & psychology
3
630 - Agriculture & related technologies
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
370 - Education
2
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
300 - Social sciences
1
500 - Natural sciences & mathematics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
657 - Accounting
1
658 - General management
1