Classification
prev ...
352 - General considerations of public administration
1
361 - Social problems & social welfare in general
1
371 - Schools & their activities; special education
1
382 - International commerce
1
388 - Transportation; ground transportation
1
590 - Animals (Zoology)
1
604 - Special topics
1
643 - Housing & household equipment
1
651 - Office services
1
660 - Chemical engineering
1
741 - Drawing & drawings
1
781 - General principles & musical forms
1