Classification
330 - Economics
233
320 - Political science
153
370 - Education
94
333 - Economics of land & energy
72
610 - Medicine & health
68
900 - History & geography
64
304 - Factors affecting social behavior
49
363 - Other social problems & services
45
380 - Commerce, communications & transportation
39
700 - The arts; fine & decorative arts
39
340 - Law
37
305 - Social groups
27
000 - Computer science, information & general works
25
658 - General management
25
140 - Specific philosophical schools
23
994 - Australia
23
338 - Production
21
300 - Social sciences
20
551 - Geology, hydrology & meteorology
20
600 - Technology
19
327 - International relations
15
355 - Military science
15
800 - Literature & rhetoric
14
306 - Culture & institutions
13
500 - Natural sciences & mathematics
12
158 - Applied psychology
11
331 - Labor economics
11
332 - Financial economics
11
301 - Sociology & anthropology
10
324 - The political process
9
362 - Social welfare problems & services
9
576 - Genetics & evolution
9
581 - Specific topics in natural history
9
620 - Engineering & allied operations
9
630 - Agriculture & related technologies
9
650 - Management & auxiliary services
9
100 - Philosophy & psychology
8
342 - Constitutional & administrative law
8
346 - Private law
8
351 - Public administration
8
352 - General considerations of public administration
8
381 - Commerce
8
414 - Phonology & phonetics
8
001 - Knowledge
7
302 - Social interaction
7
336 - Public finance
7
361 - Social problems & social welfare in general
7
580 - Plants (Botany)
7
940 - History of Europe
7
339 - Macroeconomics & related topics
6
more ...