Classification
330 - Economics
363 - Other social problems & services
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
140 - Specific philosophical schools
3
320 - Political science
3
551 - Geology, hydrology & meteorology
3
610 - Medicine & health
3
301 - Sociology & anthropology
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
600 - Technology
1
620 - Engineering & allied operations
1
658 - General management
1
900 - History & geography
1