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