Classification
330 - Economics
385
333 - Economics of land & energy
106
320 - Political science
79
304 - Factors affecting social behavior
69
610 - Medicine & health
39
300 - Social sciences
38
658 - General management
37
338 - Production
35
363 - Other social problems & services
30
306 - Culture & institutions
24
370 - Education
24
630 - Agriculture & related technologies
23
340 - Law
21
380 - Commerce, communications & transportation
17
301 - Sociology & anthropology
16
900 - History & geography
16
551 - Geology, hydrology & meteorology
15
700 - The arts; fine & decorative arts
15
577 - Ecology
12
600 - Technology
12
000 - Computer science, information & general works
11
332 - Financial economics
10
327 - International relations
9
331 - Labor economics
9
364 - Criminology
9
614 - Incidence & prevention of disease
9
140 - Specific philosophical schools
8
305 - Social groups
8
336 - Public finance
8
400 - Language
8
613 - Personal health & safety
8
307 - Communities
7
620 - Engineering & allied operations
7
910 - Geography & travel
7
100 - Philosophy & psychology
6
200 - Religion
6
362 - Social welfare problems & services
6
580 - Plants (Botany)
6
155 - Differential & developmental psychology
5
344 - Labor, social, education & cultural law
5
570 - Life sciences; biology
5
930 - History of ancient world to ca. 499
5
001 - Knowledge
4
005 - Computer programming, programs & data
4
297 - Islam, Babism & Bahai Faith
4
325 - International migration & colonization
4
339 - Macroeconomics & related topics
4
500 - Natural sciences & mathematics
4
634 - Orchards, fruits & forestry
4
004 - Data processing & computer science
3
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