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