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  1. 1

    Instructional strategies per Gropper, George L.

    Publicat 1974
    Llibre

    Instructional strategies
  2. 2

    Criteria for the selection and use of visuals in instruction a workbook per Gropper, George L.

    Publicat 1971
    Llibre

    Criteria for the selection and use of visuals in instruction a workbook
  3. 3

    Criteria for the selection and use of visuals in instruction a handbook per Gropper, George L.

    Publicat 1971
    Llibre

    Criteria for the selection and use of visuals in instruction a handbook

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