Classification
580 - Plants (Botany)
4
590 - Animals (Zoology)
3
577 - Ecology
2
592 - Invertebrates
2
516 - Geometry
1
520 - Astronomy & allied sciences
1
543 - Analytical chemistry
1
551 - Geology, hydrology & meteorology
1
560 - Paleontology; paleozoology
1
570 - Life sciences; biology
1
581 - Specific topics in natural history
1