Classification
300 - Social sciences
116
301 - Sociology & anthropology
109
320 - Political science
108
306 - Culture & institutions
105
305 - Social groups
99
304 - Factors affecting social behavior
98
361 - Social problems & social welfare in general
57
370 - Education
36
330 - Economics
29
307 - Communities
23
340 - Law
21
700 - The arts; fine & decorative arts
21
100 - Philosophy & psychology
19
333 - Economics of land & energy
18
900 - History & geography
17
610 - Medicine & health
14
363 - Other social problems & services
13
140 - Specific philosophical schools
12
338 - Production
12
364 - Criminology
12
600 - Technology
9
302 - Social interaction
8
360 - Social problems & services; associations
7
327 - International relations
6
380 - Commerce, communications & transportation
6
155 - Differential & developmental psychology
5
170 - Ethics
5
200 - Religion
5
297 - Islam, Babism & Bahai Faith
5
551 - Geology, hydrology & meteorology
5
000 - Computer science, information & general works
4
345 - Criminal law
4
576 - Genetics & evolution
4
303 - Social processes
3
379 - Public policy issues in education
3
614 - Incidence & prevention of disease
3
150 - Psychology
2
331 - Labor economics
2
339 - Macroeconomics & related topics
2
372 - Elementary education
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
613 - Personal health & safety
2
800 - Literature & rhetoric
2
323 - Civil & political rights
1
342 - Constitutional & administrative law
1
350 - Public administration & military science
1
371 - Schools & their activities; special education
1
378 - Higher education
1
418 - Standard usage & applied linguistics
1
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