Classification
610 - Medicine & health
46
330 - Economics
10
616 - Diseases
4
140 - Specific philosophical schools
2
362 - Social welfare problems & services
2
380 - Commerce, communications & transportation
2
600 - Technology
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
170 - Ethics
1
333 - Economics of land & energy
1
340 - Law
1
363 - Other social problems & services
1
370 - Education
1
612 - Human physiology
1