Classification
320 - Political science
360 - Social problems & services; associations
700 - The arts; fine & decorative arts
330 - Economics
4
361 - Social problems & social welfare in general
4
300 - Social sciences
3
610 - Medicine & health
3
900 - History & geography
3
000 - Computer science, information & general works
2
200 - Religion
2
370 - Education
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
170 - Ethics
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
364 - Criminology
1
380 - Commerce, communications & transportation
1
400 - Language
1
620 - Engineering & allied operations
1