Classification
320 - Political science
340 - Law
000 - Computer science, information & general works
4
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
3
363 - Other social problems & services
3
600 - Technology
3
610 - Medicine & health
3
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
330 - Economics
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1