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The origins and development of elementary-school scienceUnderhill, Orra Ervin, January 1900 (has links)
Thesis (Ph. D.)--Columbia University, 1941. / Published also without thesis note. Vita.
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Promoting high school students' conceptual understandings of the particulate nature of matter through multiple representationsAdadan, Emine, January 2006 (has links)
Thesis (Ph. D.)--Ohio State University, 2006. / Title from first page of PDF file. Includes bibliographical references (p. 338-353).
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