Classification
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331 - Labor economics
1
336 - Public finance
1
346 - Private law
1
353 - Specific fields of public administration
1
364 - Criminology
1
398 - Folklore
1
414 - Phonology & phonetics
1
507 - Education, research & related topics
1
520 - Astronomy & allied sciences
1
539 - Modern physics
1
542 - Techniques, equipment & materials
1
550 - Earth sciences
1
590 - Animals (Zoology)
1
621 - Applied physics
1
629 - Other branches of engineering
1
657 - Accounting
1
670 - Manufacturing
1