Classification
320 - Political science
3
333 - Economics of land & energy
3
363 - Other social problems & services
3
370 - Education
630 - Agriculture & related technologies
000 - Computer science, information & general works
2
330 - Economics
2
600 - Technology
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
300 - Social sciences
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
657 - Accounting
1