Classification
578 - Natural history of organisms
54
577 - Ecology
17
590 - Animals (Zoology)
13
595 - Arthropods
13
591 - Specific topics in natural history
9
571 - Physiology & related subjects
5
634 - Orchards, fruits & forestry
5
576 - Genetics & evolution
4
560 - Paleontology; paleozoology
3
579 - Microorganisms, fungi & algae
3
592 - Invertebrates
3
572 - Biochemistry
2
540 - Chemistry & allied sciences
1
612 - Human physiology
1
616 - Diseases
1
630 - Agriculture & related technologies
1