Classification
320 - Political science
330 - Economics
741
340 - Law
176
300 - Social sciences
111
363 - Other social problems & services
100
333 - Economics of land & energy
94
630 - Agriculture & related technologies
72
700 - The arts; fine & decorative arts
52
900 - History & geography
52
140 - Specific philosophical schools
45
000 - Computer science, information & general works
43
610 - Medicine & health
42
600 - Technology
37
380 - Commerce, communications & transportation
34
304 - Factors affecting social behavior
31
551 - Geology, hydrology & meteorology
25
370 - Education
21
620 - Engineering & allied operations
17
361 - Social problems & social welfare in general
16
100 - Philosophy & psychology
14
581 - Specific topics in natural history
14
170 - Ethics
12
301 - Sociology & anthropology
10
200 - Religion
9
800 - Literature & rhetoric
9
580 - Plants (Botany)
8
658 - General management
8
336 - Public finance
6
414 - Phonology & phonetics
5
500 - Natural sciences & mathematics
5
576 - Genetics & evolution
5
360 - Social problems & services; associations
4
297 - Islam, Babism & Bahai Faith
3
400 - Language
3
657 - Accounting
3
720 - Architecture
3
350 - Public administration & military science
2
364 - Criminology
2
540 - Chemistry & allied sciences
2
323 - Civil & political rights
1
398 - Folklore
1
410 - Linguistics
1
530 - Physics
1
550 - Earth sciences
1
650 - Management & auxiliary services
1