Classification
330 - Economics
363 - Other social problems & services
580 - Plants (Botany)
610 - Medicine & health
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
320 - Political science
2
333 - Economics of land & energy
2
700 - The arts; fine & decorative arts
2
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
620 - Engineering & allied operations
1
657 - Accounting
1
720 - Architecture
1
900 - History & geography
1