Classification
170 - Ethics
363 - Other social problems & services
320 - Political science
12
333 - Economics of land & energy
6
700 - The arts; fine & decorative arts
6
100 - Philosophy & psychology
5
330 - Economics
5
600 - Technology
5
620 - Engineering & allied operations
5
610 - Medicine & health
4
900 - History & geography
4
200 - Religion
3
300 - Social sciences
3
551 - Geology, hydrology & meteorology
3
630 - Agriculture & related technologies
3
000 - Computer science, information & general works
2
340 - Law
2
380 - Commerce, communications & transportation
2
581 - Specific topics in natural history
2
140 - Specific philosophical schools
1
361 - Social problems & social welfare in general
1
370 - Education
1
658 - General management
1
720 - Architecture
1
800 - Literature & rhetoric
1