Classification
591 - Specific topics in natural history
21
611 - Human anatomy, cytology & histology
12
570 - Life sciences; biology
10
599 - Mammals
9
571 - Physiology & related subjects
8
576 - Genetics & evolution
8
590 - Animals (Zoology)
6
595 - Arthropods
6
610 - Medicine & health
6
577 - Ecology
4
616 - Diseases
4
572 - Biochemistry
3
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
573 - Specific physiological systems in animals
1
581 - Specific topics in natural history
1
614 - Incidence & prevention of disease
1
615 - Pharmacology & therapeutics
1
630 - Agriculture & related technologies
1