Classification
610 - Medicine & health
147
330 - Economics
17
700 - The arts; fine & decorative arts
9
362 - Social welfare problems & services
8
380 - Commerce, communications & transportation
5
000 - Computer science, information & general works
4
170 - Ethics
4
370 - Education
4
600 - Technology
3
363 - Other social problems & services
2
613 - Personal health & safety
2
616 - Diseases
2
900 - History & geography
2
100 - Philosophy & psychology
1
365 - Penal & related institutions
1
400 - Language
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1