Classification
330 - Economics
3
333 - Economics of land & energy
3
363 - Other social problems & services
3
620 - Engineering & allied operations
900 - History & geography
000 - Computer science, information & general works
2
700 - The arts; fine & decorative arts
2
720 - Architecture
2
297 - Islam, Babism & Bahai Faith
1
370 - Education
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
600 - Technology
1