Classification
140 - Specific philosophical schools
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
576 - Genetics & evolution
2
600 - Technology
2
610 - Medicine & health
2
304 - Factors affecting social behavior
1
363 - Other social problems & services
1
580 - Plants (Botany)
1
700 - The arts; fine & decorative arts
1