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Pressey teaching machine (Q650)

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Revision as of 17:20, 11 June 2026 by Espartatuga (talk | contribs) (‎Created claim: Wikidata entity (P114): Q140176787)
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    Pressey teaching machine
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      Wikidata entity
      Q140176787
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      Retrieved from "https://wikibase.tools.labs.wikimedia.pt/w/index.php?title=Item:Q650&oldid=7469"