Classification
610 - Medicine & health
700 - The arts; fine & decorative arts
333 - Economics of land & energy
4
370 - Education
4
140 - Specific philosophical schools
3
330 - Economics
3
100 - Philosophy & psychology
2
320 - Political science
2
600 - Technology
2
620 - Engineering & allied operations
2
200 - Religion
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
400 - Language
1
791 - Public performances
1
900 - History & geography
1