Classification
581 - Specific topics in natural history
900 - History & geography
000 - Computer science, information & general works
5
580 - Plants (Botany)
4
700 - The arts; fine & decorative arts
4
363 - Other social problems & services
3
576 - Genetics & evolution
3
333 - Economics of land & energy
2
414 - Phonology & phonetics
2
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1