Classification
330 - Economics
118
610 - Medicine & health
30
304 - Factors affecting social behavior
25
333 - Economics of land & energy
19
370 - Education
19
320 - Political science
15
363 - Other social problems & services
9
336 - Public finance
8
900 - History & geography
7
140 - Specific philosophical schools
6
380 - Commerce, communications & transportation
4
600 - Technology
4
200 - Religion
3
340 - Law
3
400 - Language
3
410 - Linguistics
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
615 - Pharmacology & therapeutics
2
170 - Ethics
1
280 - Christian denominations & sects
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
338 - Production
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
630 - Agriculture & related technologies
1
658 - General management
1
720 - Architecture
1
800 - Literature & rhetoric
1