Classification
304 - Factors affecting social behavior
2
510 - Mathematics
2
515 - Analysis
5
519 - Probabilities & applied mathematics
3
560 - Paleontology; paleozoology
1
570 - Life sciences; biology
3
577 - Ecology
8
578 - Natural history of organisms
1
591 - Specific topics in natural history
1
614 - Incidence & prevention of disease
1
621 - Applied physics
1