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