Classification
363 - Other social problems & services
370 - Education
700 - The arts; fine & decorative arts
610 - Medicine & health
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
140 - Specific philosophical schools
3
320 - Political science
3
330 - Economics
3
380 - Commerce, communications & transportation
3
600 - Technology
3
620 - Engineering & allied operations
3
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
658 - General management
2
900 - History & geography
2
100 - Philosophy & psychology
1
200 - Religion
1
304 - Factors affecting social behavior
1
340 - Law
1
414 - Phonology & phonetics
1
581 - Specific topics in natural history
1