Classification
320 - Political science
333 - Economics of land & energy
363 - Other social problems & services
370 - Education
610 - Medicine & health
4
700 - The arts; fine & decorative arts
3
330 - Economics
2
600 - Technology
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
900 - History & geography
1