Classification
540 - Chemistry & allied sciences
6
000 - Computer science, information & general works
4
546 - Inorganic chemistry
4
600 - Technology
4
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
2
541 - Physical chemistry
2
330 - Economics
1
338 - Production
1
363 - Other social problems & services
1
400 - Language
1
410 - Linguistics
1
547 - Organic chemistry
1
574 - [Unassigned]
1
610 - Medicine & health
1
660 - Chemical engineering
1
900 - History & geography
1