Classification
100 - Philosophy & psychology
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
576 - Genetics & evolution
700 - The arts; fine & decorative arts
580 - Plants (Botany)
2
610 - Medicine & health
2
620 - Engineering & allied operations
2
320 - Political science
1
330 - Economics
1
363 - Other social problems & services
1
600 - Technology
1
900 - History & geography
1