Classification
300 - Social sciences
330 - Economics
301 - Sociology & anthropology
10
320 - Political science
9
900 - History & geography
7
333 - Economics of land & energy
5
340 - Law
5
140 - Specific philosophical schools
3
304 - Factors affecting social behavior
3
363 - Other social problems & services
3
361 - Social problems & social welfare in general
2
610 - Medicine & health
2
170 - Ethics
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
364 - Criminology
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1