Classification
579 - Microorganisms, fungi & algae
32
630 - Agriculture & related technologies
10
660 - Chemical engineering
10
571 - Physiology & related subjects
3
572 - Biochemistry
3
620 - Engineering & allied operations
3
631 - Techniques, equipment & materials
3
333 - Economics of land & energy
2
304 - Factors affecting social behavior
1
547 - Organic chemistry
1
570 - Life sciences; biology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
616 - Diseases
1
628 - Sanitary & municipal engineering
1
664 - Food technology
1