Classification
330 - Economics
104
320 - Political science
64
900 - History & geography
43
333 - Economics of land & energy
34
370 - Education
27
304 - Factors affecting social behavior
24
610 - Medicine & health
24
340 - Law
15
363 - Other social problems & services
14
700 - The arts; fine & decorative arts
11
300 - Social sciences
9
301 - Sociology & anthropology
9
140 - Specific philosophical schools
8
336 - Public finance
7
000 - Computer science, information & general works
6
380 - Commerce, communications & transportation
6
305 - Social groups
5
600 - Technology
5
720 - Architecture
5
780 - Music
5
820 - English & Old English literatures
5
940 - History of Europe
5
170 - Ethics
4
630 - Agriculture & related technologies
4
943 - Central Europe; Germany
4
200 - Religion
3
398 - Folklore
3
620 - Engineering & allied operations
3
658 - General management
3
282 - Roman Catholic Church
2
327 - International relations
2
331 - Labor economics
2
338 - Production
2
364 - Criminology
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
616 - Diseases
2
800 - Literature & rhetoric
2
150 - Psychology
1
284 - Protestants of Continental origin
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
323 - Civil & political rights
1
332 - Financial economics
1
335 - Socialism & related systems
1
342 - Constitutional & administrative law
1
344 - Labor, social, education & cultural law
1
347 - Civil procedure & courts
1
361 - Social problems & social welfare in general
1
371 - Schools & their activities; special education
1
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