Classification
571 - Physiology & related subjects
256
580 - Plants (Botany)
128
630 - Agriculture & related technologies
93
581 - Specific topics in natural history
79
572 - Biochemistry
54
631 - Techniques, equipment & materials
44
660 - Chemical engineering
43
579 - Microorganisms, fungi & algae
26
577 - Ecology
21
578 - Natural history of organisms
16
634 - Orchards, fruits & forestry
12
333 - Economics of land & energy
7
570 - Life sciences; biology
7
620 - Engineering & allied operations
4
616 - Diseases
3
005 - Computer programming, programs & data
2
304 - Factors affecting social behavior
2
547 - Organic chemistry
2
576 - Genetics & evolution
2
610 - Medicine & health
2
001 - Knowledge
1
300 - Social sciences
1
363 - Other social problems & services
1
509 - Historical, geographic & persons treatment
1
540 - Chemistry & allied sciences
1
543 - Analytical chemistry
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
553 - Economic geology
1
560 - Paleontology; paleozoology
1
590 - Animals (Zoology)
1
592 - Invertebrates
1
615 - Pharmacology & therapeutics
1
664 - Food technology
1
690 - Buildings
1
910 - Geography & travel
1