Classification
632 - Plant injuries, diseases & pests
5
000 - Computer science, information & general works
4
700 - The arts; fine & decorative arts
4
363 - Other social problems & services
3
540 - Chemistry & allied sciences
3
610 - Medicine & health
3
628 - Sanitary & municipal engineering
3
330 - Economics
2
543 - Analytical chemistry
2
600 - Technology
2
620 - Engineering & allied operations
2
900 - History & geography
2
140 - Specific philosophical schools
1
340 - Law
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
541 - Physical chemistry
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
615 - Pharmacology & therapeutics
1
616 - Diseases
1
662 - Explosives, fuels & related products
1