Classification
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631 - Techniques, equipment & materials
170
629 - Other branches of engineering
165
658 - General management
158
100 - Philosophy & psychology
152
550 - Earth sciences
149
370 - Education
148
501 - Philosophy & theory
148
301 - Sociology & anthropology
144
641 - Food & drink
137
634 - Orchards, fruits & forestry
136
628 - Sanitary & municipal engineering
132
518 - Numerical analysis
126
592 - Invertebrates
124
591 - Specific topics in natural history
116
150 - Psychology
115
155 - Differential & developmental psychology
110
414 - Phonology & phonetics
101
510 - Mathematics
101
170 - Ethics
97
320 - Political science
94
338 - Production
89
636 - Animal husbandry
89
340 - Law
77
539 - Modern physics
75
560 - Paleontology; paleozoology
75
306 - Culture & institutions
74
546 - Inorganic chemistry
70
720 - Architecture
70
800 - Literature & rhetoric
70
578 - Natural history of organisms
66
153 - Mental processes & intelligence
62
511 - General principles of mathematics
57
573 - Specific physiological systems in animals
54
520 - Astronomy & allied sciences
49
930 - History of ancient world to ca. 499
45
050 - General serial publications
44
303 - Social processes
44
174 - Occupational ethics
43
361 - Social problems & social welfare in general
42
507 - Education, research & related topics
42
302 - Social interaction
41
305 - Social groups
41
331 - Labor economics
40
061 - Organizations in North America
39
535 - Light & infrared & ultraviolet phenomena
38
670 - Manufacturing
38
574 - [Unassigned]
36
632 - Plant injuries, diseases & pests
36
531 - Classical mechanics; solid mechanics
35
400 - Language
33
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