Classification
630 - Agriculture & related technologies
610 - Medicine & health
3
330 - Economics
2
363 - Other social problems & services
2
580 - Plants (Botany)
2
600 - Technology
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
340 - Law
1
370 - Education
1
581 - Specific topics in natural history
1