Classification
540 - Chemistry & allied sciences
600 - Technology
615 - Pharmacology & therapeutics
610 - Medicine & health
3
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
304 - Factors affecting social behavior
1
333 - Economics of land & energy
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1