Classification
610 - Medicine & health
6
630 - Agriculture & related technologies
2
330 - Economics
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
572 - Biochemistry
1
580 - Plants (Botany)
1
590 - Animals (Zoology)
1
660 - Chemical engineering
1