Classification
330 - Economics
333 - Economics of land & energy
4
363 - Other social problems & services
380 - Commerce, communications & transportation
551 - Geology, hydrology & meteorology
576 - Genetics & evolution
320 - Political science
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
600 - Technology
2
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
370 - Education
1
414 - Phonology & phonetics
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
658 - General management
1