Classification
330 - Economics
1,088
900 - History & geography
256
338 - Production
194
320 - Political science
122
300 - Social sciences
109
339 - Macroeconomics & related topics
69
332 - Financial economics
67
658 - General management
49
333 - Economics of land & energy
36
337 - International economics
26
100 - Philosophy & psychology
23
500 - Natural sciences & mathematics
16
940 - History of Europe
16
336 - Public finance
15
381 - Commerce
15
306 - Culture & institutions
14
380 - Commerce, communications & transportation
14
301 - Sociology & anthropology
12
331 - Labor economics
11
363 - Other social problems & services
11
304 - Factors affecting social behavior
10
382 - International commerce
10
700 - The arts; fine & decorative arts
10
000 - Computer science, information & general works
9
302 - Social interaction
8
327 - International relations
8
630 - Agriculture & related technologies
8
001 - Knowledge
7
340 - Law
7
600 - Technology
7
800 - Literature & rhetoric
7
909 - World history
7
941 - British Isles
7
140 - Specific philosophical schools
6
610 - Medicine & health
6
943 - Central Europe; Germany
6
170 - Ethics
5
200 - Religion
5
335 - Socialism & related systems
5
657 - Accounting
5
670 - Manufacturing
5
303 - Social processes
4
307 - Communities
4
620 - Engineering & allied operations
4
947 - Eastern Europe; Russia
4
951 - China & adjacent areas
4
325 - International migration & colonization
3
343 - Military, tax, trade & industrial law
3
350 - Public administration & military science
3
361 - Social problems & social welfare in general
3
more ...