Classification
000 - Computer science, information & general works
363 - Other social problems & services
576 - Genetics & evolution
330 - Economics
5
140 - Specific philosophical schools
3
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
700 - The arts; fine & decorative arts
3
320 - Political science
2
581 - Specific topics in natural history
2
600 - Technology
2
620 - Engineering & allied operations
2
900 - History & geography
2
304 - Factors affecting social behavior
1
340 - Law
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
657 - Accounting
1