Item:Q7730: Difference between revisions

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Q650
label / enlabel / en
Pressey teaching machine
Property / subclass of
 
Property / subclass of: teaching machine / rank
Normal rank
 
Property / discoverer or inventor
 
Property / discoverer or inventor: Sidney L. Pressey / rank
Normal rank
 

Latest revision as of 17:19, 11 June 2026

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