Classification
320 - Political science
330 - Economics
363 - Other social problems & services
576 - Genetics & evolution
333 - Economics of land & energy
13
000 - Computer science, information & general works
8
380 - Commerce, communications & transportation
8
600 - Technology
6
700 - The arts; fine & decorative arts
5
140 - Specific philosophical schools
4
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
610 - Medicine & health
3
658 - General management
3
800 - Literature & rhetoric
3
100 - Philosophy & psychology
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
410 - Linguistics
2
900 - History & geography
2
301 - Sociology & anthropology
1
340 - Law
1
350 - Public administration & military science
1
370 - Education
1
400 - Language
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
657 - Accounting
1