Classification
330 - Economics
27
610 - Medicine & health
24
700 - The arts; fine & decorative arts
11
370 - Education
10
600 - Technology
9
338 - Production
3
540 - Chemistry & allied sciences
3
140 - Specific philosophical schools
2
353 - Specific fields of public administration
1
363 - Other social problems & services
1
509 - Historical, geographic & persons treatment
1
543 - Analytical chemistry
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1
660 - Chemical engineering
1
900 - History & geography
1