Classification
333 - Economics of land & energy
370 - Education
4
900 - History & geography
330 - Economics
3
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
320 - Political science
1
361 - Social problems & social welfare in general
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1