Classification
543 - Analytical chemistry
7
660 - Chemical engineering
3
628 - Sanitary & municipal engineering
2
668 - Technology of other organic products
2
681 - Precision instruments & other devices
2
541 - Physical chemistry
1
547 - Organic chemistry
1
574 - [Unassigned]
1
576 - Genetics & evolution
1
615 - Pharmacology & therapeutics
1
930 - History of ancient world to ca. 499
1