Classification
320 - Political science
360 - Social problems & services; associations
361 - Social problems & social welfare in general
29
330 - Economics
7
300 - Social sciences
6
610 - Medicine & health
5
140 - Specific philosophical schools
4
551 - Geology, hydrology & meteorology
4
700 - The arts; fine & decorative arts
4
900 - History & geography
4
340 - Law
3
364 - Criminology
3
370 - Education
3
170 - Ethics
2
304 - Factors affecting social behavior
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
200 - Religion
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
350 - Public administration & military science
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
400 - Language
1
500 - Natural sciences & mathematics
1
600 - Technology
1
620 - Engineering & allied operations
1