Classification
620 - Engineering & allied operations
11
571 - Physiology & related subjects
3
660 - Chemical engineering
3
005 - Computer programming, programs & data
1
541 - Physical chemistry
1
577 - Ecology
1
581 - Specific topics in natural history
1
616 - Diseases
1
630 - Agriculture & related technologies
1
631 - Techniques, equipment & materials
1
634 - Orchards, fruits & forestry
1