Classification
330 - Economics
1,839
320 - Political science
1,172
800 - Literature & rhetoric
961
860 - Spanish & Portuguese literatures
870
900 - History & geography
853
370 - Education
390
300 - Social sciences
378
340 - Law
311
658 - General management
269
610 - Medicine & health
185
333 - Economics of land & energy
164
700 - The arts; fine & decorative arts
163
338 - Production
129
304 - Factors affecting social behavior
127
100 - Philosophy & psychology
124
140 - Specific philosophical schools
120
301 - Sociology & anthropology
118
972 - Middle America; Mexico
103
000 - Computer science, information & general works
99
363 - Other social problems & services
94
380 - Commerce, communications & transportation
88
400 - Language
84
305 - Social groups
82
600 - Technology
81
302 - Social interaction
71
331 - Labor economics
70
410 - Linguistics
58
650 - Management & auxiliary services
58
158 - Applied psychology
55
630 - Agriculture & related technologies
54
306 - Culture & institutions
53
780 - Music
50
303 - Social processes
45
500 - Natural sciences & mathematics
45
381 - Commerce
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
25
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 ...