Classification
320 - Political science
363 - Other social problems & services
333 - Economics of land & energy
44
330 - Economics
38
700 - The arts; fine & decorative arts
30
551 - Geology, hydrology & meteorology
25
000 - Computer science, information & general works
23
600 - Technology
23
900 - History & geography
14
610 - Medicine & health
13
581 - Specific topics in natural history
12
140 - Specific philosophical schools
11
380 - Commerce, communications & transportation
11
304 - Factors affecting social behavior
8
576 - Genetics & evolution
8
620 - Engineering & allied operations
8
630 - Agriculture & related technologies
7
340 - Law
6
297 - Islam, Babism & Bahai Faith
4
658 - General management
4
300 - Social sciences
3
370 - Education
3
410 - Linguistics
3
200 - Religion
2
400 - Language
2
414 - Phonology & phonetics
2
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
580 - Plants (Botany)
1
720 - Architecture
1
800 - Literature & rhetoric
1