1.

図書

図書
Organisation for Economic Co-operation and Development
出版情報: Paris : Organisation for Economic Co-operation and Development, 1974
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2.

図書

図書
Héctor Correa
出版情報: Scranton : International Textbook Co, c1969
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3.

図書

図書
International Institute for Educational Planning
出版情報: Paris : Unesco: International Institute for Educational Planning, 1968
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