Classification
330 - Economics
360 - Social problems & services; associations
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
610 - Medicine & health
2
320 - Political science
1
333 - Economics of land & energy
1
370 - Education
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1