Classification
330 - Economics
1,753
338 - Production
300
320 - Political science
274
333 - Economics of land & energy
175
300 - Social sciences
131
658 - General management
129
332 - Financial economics
125
339 - Macroeconomics & related topics
94
519 - Probabilities & applied mathematics
84
331 - Labor economics
70
900 - History & geography
67
304 - Factors affecting social behavior
61
337 - International economics
47
336 - Public finance
43
363 - Other social problems & services
42
301 - Sociology & anthropology
39
610 - Medicine & health
38
100 - Philosophy & psychology
35
306 - Culture & institutions
33
340 - Law
33
380 - Commerce, communications & transportation
29
006 - Special computer methods
26
621 - Applied physics
26
500 - Natural sciences & mathematics
24
620 - Engineering & allied operations
24
551 - Geology, hydrology & meteorology
21
630 - Agriculture & related technologies
21
327 - International relations
20
600 - Technology
19
343 - Military, tax, trade & industrial law
18
302 - Social interaction
17
000 - Computer science, information & general works
16
361 - Social problems & social welfare in general
16
515 - Analysis
16
530 - Physics
16
305 - Social groups
15
003 - Systems
14
140 - Specific philosophical schools
14
501 - Philosophy & theory
14
001 - Knowledge
13
381 - Commerce
13
613 - Personal health & safety
13
614 - Incidence & prevention of disease
13
700 - The arts; fine & decorative arts
13
382 - International commerce
12
800 - Literature & rhetoric
12
005 - Computer programming, programs & data
11
170 - Ethics
11
346 - Private law
11
510 - Mathematics
11
more ...