Classification
330 - Economics
4
370 - Education
4
610 - Medicine & health
4
333 - Economics of land & energy
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
320 - Political science
2
600 - Technology
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
170 - Ethics
1
293 - Germanic religion
1
340 - Law
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
570 - Life sciences; biology
1
780 - Music
1
791 - Public performances
1