Classification
304 - Factors affecting social behavior
330 - Economics
7
300 - Social sciences
3
900 - History & geography
3
301 - Sociology & anthropology
2
370 - Education
2
140 - Specific philosophical schools
1
320 - Political science
1
333 - Economics of land & energy
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
610 - Medicine & health
1
770 - Photography, photographs & computer art
1