Classification
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515 - Analysis
1
516 - Geometry
1
531 - Classical mechanics; solid mechanics
1
581 - Specific topics in natural history
1
628 - Sanitary & municipal engineering
1
650 - Management & auxiliary services
1
770 - Photography, photographs & computer art
1
777 - [Unassigned]
1
780 - Music
1
786 - Keyboard & other instruments
1