Classification
320 - Political science
363 - Other social problems & services
333 - Economics of land & energy
5
610 - Medicine & health
5
700 - The arts; fine & decorative arts
5
330 - Economics
4
600 - Technology
4
140 - Specific philosophical schools
3
000 - Computer science, information & general works
2
370 - Education
2
551 - Geology, hydrology & meteorology
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
900 - History & geography
2
100 - Philosophy & psychology
1
340 - Law
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1