1.

図書
図書
1. Organization and administration of secondary schools. Rev. ed
by Harl R.Douglass
出版情報: Boston : Ginn, c1945
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2.

図書
図書
2. The high school curriculum
ed. by Harl R. Douglass ; by Vernon E. Anderson, Rudyard K. Bent, Nelson L. Bossing ...[et al.]
出版情報: New York : The Ronald Press Co., c1947
シリーズ名: Douglass series in education
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3.

図書
図書
3. Trends and issues in secondary education
Harl R. Douglass
出版情報: Washington, D.C. : Center for Applied Research in Education, 1962
シリーズ名: The library of education
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4.

図書
図書
4. Teaching in elementary school
by Marie A. Mehl, Hubert H. Mills [and] Harl R. Douglass
出版情報: New York : Ronald Press, c1950
シリーズ名: Douglass series in education
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