Classification
330 - Economics
1,787
320 - Political science
1,175
800 - Literature & rhetoric
961
860 - Spanish & Portuguese literatures
870
900 - History & geography
854
370 - Education
391
300 - Social sciences
377
340 - Law
311
658 - General management
270
610 - Medicine & health
191
333 - Economics of land & energy
166
700 - The arts; fine & decorative arts
163
338 - Production
131
304 - Factors affecting social behavior
129
100 - Philosophy & psychology
124
140 - Specific philosophical schools
120
301 - Sociology & anthropology
118
972 - Middle America; Mexico
103
000 - Computer science, information & general works
95
363 - Other social problems & services
94
380 - Commerce, communications & transportation
88
400 - Language
84
600 - Technology
83
305 - Social groups
82
331 - Labor economics
72
302 - Social interaction
71
650 - Management & auxiliary services
60
410 - Linguistics
58
158 - Applied psychology
56
630 - Agriculture & related technologies
54
306 - Culture & institutions
53
780 - Music
50
303 - Social processes
45
381 - Commerce
45
500 - Natural sciences & mathematics
44
336 - Public finance
42
327 - International relations
38
200 - Religion
36
153 - Mental processes & intelligence
33
540 - Chemistry & allied sciences
33
384 - Communications; telecommunication
31
980 - History of South America
26
170 - Ethics
25
332 - Financial economics
24
720 - Architecture
22
576 - Genetics & evolution
20
620 - Engineering & allied operations
20
861 - Spanish poetry
19
307 - Communities
18
362 - Social welfare problems & services
18
more ...