Classification
630 - Agriculture & related technologies
700 - The arts; fine & decorative arts
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
600 - Technology
3
000 - Computer science, information & general works
2
363 - Other social problems & services
2
580 - Plants (Botany)
2
610 - Medicine & health
2
330 - Economics
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
612 - Human physiology
1
620 - Engineering & allied operations
1
900 - History & geography
1