Classification
304 - Factors affecting social behavior
610 - Medicine & health
333 - Economics of land & energy
2
363 - Other social problems & services
2
576 - Genetics & evolution
2
140 - Specific philosophical schools
1
380 - Commerce, communications & transportation
1
600 - Technology
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
700 - The arts; fine & decorative arts
1