Classification
001 - Knowledge
5
300 - Social sciences
4
510 - Mathematics
4
306 - Culture & institutions
3
570 - Life sciences; biology
3
304 - Factors affecting social behavior
2
509 - Historical, geographic & persons treatment
2
616 - Diseases
2
003 - Systems
1
150 - Psychology
1
301 - Sociology & anthropology
1
327 - International relations
1
330 - Economics
1
333 - Economics of land & energy
1
338 - Production
1
370 - Education
1
572 - Biochemistry
1
573 - Specific physiological systems in animals
1
591 - Specific topics in natural history
1
599 - Mammals
1
607 - Education, research & related topics
1
612 - Human physiology
1
634 - Orchards, fruits & forestry
1
701 - Philosophy of fine & decorative arts
1
907 - Education, research & related topics
1