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