Classification
100 - Philosophy & psychology
304 - Factors affecting social behavior
610 - Medicine & health
140 - Specific philosophical schools
3
320 - Political science
2
330 - Economics
2
170 - Ethics
1
333 - Economics of land & energy
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1