Pressey teaching machine (Q7735)

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Revision as of 18:32, 11 June 2026 by Espartatuga (talk | contribs) (‎Created claim: described at URL (P214): https://www.si.edu/object/pressey-teaching-machine%3Anmah_1367149)
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exemplar of Pressey teaching machine in National Museum of American History
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Pressey teaching machine
exemplar of Pressey teaching machine in National Museum of American History

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