Classification
363 - Other social problems & services
2
540 - Chemistry & allied sciences
2
620 - Engineering & allied operations
2
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1