Classification
362 - Social welfare problems & services
610 - Medicine & health
52
330 - Economics
8
700 - The arts; fine & decorative arts
5
370 - Education
4
100 - Philosophy & psychology
3
333 - Economics of land & energy
3
361 - Social problems & social welfare in general
3
380 - Commerce, communications & transportation
3
900 - History & geography
3
600 - Technology
2
000 - Computer science, information & general works
1
170 - Ethics
1
340 - Law
1
363 - Other social problems & services
1