Classification
140 - Specific philosophical schools
3
581 - Specific topics in natural history
600 - Technology
3
620 - Engineering & allied operations
900 - History & geography
330 - Economics
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
700 - The arts; fine & decorative arts
2
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
380 - Commerce, communications & transportation
1
580 - Plants (Botany)
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
658 - General management
1
780 - Music
1