1.

図書
図書
1. Democracy in school administration
by G. Robert Koopman, Alice Miel and Paul J. Misner
出版情報: New York : Appleton-Century-Crofts, c1943
シリーズ名: Appleton-Century series in administration / ed. by Fred C. Ayer and Fred Engelhardt
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2.

図書
図書
2. Curriculum development
[by] G. Robert Koopman
出版情報: New York : Center for Applied Research in Education, c1966
シリーズ名: The library of education
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