Classification
320 - Political science
330 - Economics
82
333 - Economics of land & energy
38
900 - History & geography
34
700 - The arts; fine & decorative arts
15
340 - Law
13
300 - Social sciences
10
304 - Factors affecting social behavior
10
610 - Medicine & health
9
363 - Other social problems & services
6
370 - Education
6
630 - Agriculture & related technologies
6
000 - Computer science, information & general works
5
380 - Commerce, communications & transportation
4
600 - Technology
4
140 - Specific philosophical schools
3
200 - Religion
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
780 - Music
3
301 - Sociology & anthropology
2
361 - Social problems & social welfare in general
2
658 - General management
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
364 - Criminology
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
650 - Management & auxiliary services
1
657 - Accounting
1