Classification
330 - Economics
610 - Medicine & health
20
370 - Education
4
361 - Social problems & social welfare in general
3
362 - Social welfare problems & services
2
372 - Elementary education
2
500 - Natural sciences & mathematics
2
700 - The arts; fine & decorative arts
2
305 - Social groups
1
338 - Production
1
363 - Other social problems & services
1
371 - Schools & their activities; special education
1
616 - Diseases
1
620 - Engineering & allied operations
1
658 - General management
1