Classification
330 - Economics
719
338 - Production
174
900 - History & geography
124
339 - Macroeconomics & related topics
65
332 - Financial economics
60
320 - Political science
59
658 - General management
47
300 - Social sciences
45
333 - Economics of land & energy
29
337 - International economics
24
381 - Commerce
15
500 - Natural sciences & mathematics
15
940 - History of Europe
15
336 - Public finance
14
100 - Philosophy & psychology
13
306 - Culture & institutions
13
301 - Sociology & anthropology
11
331 - Labor economics
11
304 - Factors affecting social behavior
10
382 - International commerce
9
327 - International relations
8
302 - Social interaction
7
909 - World history
7
941 - British Isles
7
000 - Computer science, information & general works
6
363 - Other social problems & services
6
001 - Knowledge
5
335 - Socialism & related systems
5
380 - Commerce, communications & transportation
5
600 - Technology
5
610 - Medicine & health
5
670 - Manufacturing
5
140 - Specific philosophical schools
4
303 - Social processes
4
307 - Communities
4
340 - Law
4
700 - The arts; fine & decorative arts
4
800 - Literature & rhetoric
4
947 - Eastern Europe; Russia
4
951 - China & adjacent areas
4
325 - International migration & colonization
3
361 - Social problems & social welfare in general
3
384 - Communications; telecommunication
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
657 - Accounting
3
809 - History, description & criticism
3
158 - Applied psychology
2
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