Classification
320 - Political science
333 - Economics of land & energy
330 - Economics
52
363 - Other social problems & services
38
551 - Geology, hydrology & meteorology
24
700 - The arts; fine & decorative arts
23
600 - Technology
20
300 - Social sciences
18
380 - Commerce, communications & transportation
18
610 - Medicine & health
18
900 - History & geography
16
000 - Computer science, information & general works
15
140 - Specific philosophical schools
13
340 - Law
13
370 - Education
12
581 - Specific topics in natural history
11
304 - Factors affecting social behavior
6
620 - Engineering & allied operations
6
630 - Agriculture & related technologies
6
301 - Sociology & anthropology
5
170 - Ethics
4
576 - Genetics & evolution
4
580 - Plants (Botany)
4
100 - Philosophy & psychology
3
658 - General management
3
200 - Religion
2
297 - Islam, Babism & Bahai Faith
2
336 - Public finance
2
361 - Social problems & social welfare in general
2
410 - Linguistics
2
530 - Physics
2
350 - Public administration & military science
1
360 - Social problems & services; associations
1
520 - Astronomy & allied sciences
1
720 - Architecture
1
800 - Literature & rhetoric
1