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  1. 1

    Behavior technology : motivation and contingency management מאת Homme, Lloyd

    יצא לאור 1971
    ספר

    Behavior technology : motivation and contingency management
  2. 2

    How to use contingency contracting in the classroom

    יצא לאור 1970
    ספר

    How to use contingency contracting in the classroom

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