Classification
140 - Specific philosophical schools
330 - Economics
657 - Accounting
000 - Computer science, information & general works
3
333 - Economics of land & energy
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
320 - Political science
2
576 - Genetics & evolution
2
600 - Technology
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
336 - Public finance
1
370 - Education
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1
900 - History & geography
1