Classification
620 - Engineering & allied operations
12
624 - Civil engineering
6
621 - Applied physics
3
690 - Buildings
2
304 - Factors affecting social behavior
1
510 - Mathematics
1
540 - Chemistry & allied sciences
1
616 - Diseases
1
641 - Food & drink
1
650 - Management & auxiliary services
1
664 - Food technology
1
693 - Specific materials & purposes
1