Classification
361 - Social problems & social welfare in general
333 - Economics of land & energy
4
700 - The arts; fine & decorative arts
4
610 - Medicine & health
3
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
320 - Political science
2
380 - Commerce, communications & transportation
2
900 - History & geography
2
000 - Computer science, information & general works
1
330 - Economics
1
340 - Law
1
360 - Social problems & services; associations
1
370 - Education
1
400 - Language
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
630 - Agriculture & related technologies
1
791 - Public performances
1
800 - Literature & rhetoric
1