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  1. 1

    Improving schools from within teachers, parents, and principals can make the difference od Barth, Roland S.

    Wydane 1990
    Książka

    Improving schools from within teachers, parents, and principals can make the difference
  2. 2

    Open education and the American school od Barth, Roland S.

    Wydane 1972
    Książka

    Open education and the American school
  3. 3

    Improving schools from within Roland Barth. od Barth, Roland

    Książka

    Improving schools from within Roland Barth.

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