Classification
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496 - African languages
1
519 - Probabilities & applied mathematics
1
580 - Plants (Botany)
1
612 - Human physiology
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
780 - Music
1
791 - Public performances
1
947 - Eastern Europe; Russia
1
973 - United States
1