Classification
000 - Computer science, information & general works
4
580 - Plants (Botany)
4
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
363 - Other social problems & services
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
630 - Agriculture & related technologies
1