Classification
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361 - Social problems & social welfare in general
223
355 - Military science
215
260 - Social & ecclesiastical theology
209
362 - Social welfare problems & services
209
613 - Personal health & safety
209
003 - Systems
204
576 - Genetics & evolution
201
580 - Plants (Botany)
200
302 - Social interaction
192
001 - Knowledge
186
614 - Incidence & prevention of disease
170
303 - Social processes
168
342 - Constitutional & administrative law
162
371 - Schools & their activities; special education
162
612 - Human physiology
162
629 - Other branches of engineering
161
400 - Language
160
337 - International economics
159
364 - Criminology
157
615 - Pharmacology & therapeutics
153
571 - Physiology & related subjects
152
519 - Probabilities & applied mathematics
150
510 - Mathematics
147
660 - Chemical engineering
140
336 - Public finance
136
344 - Labor, social, education & cultural law
135
617 - Surgery & related medical specialties
134
350 - Public administration & military science
129
339 - Macroeconomics & related topics
128
390 - Customs, etiquette & folklore
124
378 - Higher education
123
343 - Military, tax, trade & industrial law
120
550 - Earth sciences
120
970 - History of North America
120
581 - Specific topics in natural history
118
840 - Literatures of Romance languages
114
540 - Chemistry & allied sciences
112
150 - Psychology
109
420 - English & Old English
109
930 - History of ancient world to ca. 499
109
570 - Life sciences; biology
108
410 - Linguistics
103
720 - Architecture
101
809 - History, description & criticism
100
628 - Sanitary & municipal engineering
95
020 - Library & information sciences
94
307 - Communities
94
541 - Physical chemistry
94
346 - Private law
93
670 - Manufacturing
91
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