1000 resultados para Portage Lake Observatory (University of Michigan)
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Mode of access: Internet.
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Mode of access: Internet.
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On verso of t.-p.: Edition of five hundred copies.
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Mode of access: Internet.
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Mode of access: Internet.
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Description based on: Vol. 29, no. 26 (Dec. 24, 1927); title from cover.
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Mode of access: Internet.
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The collection is housed in the Rare Book Room of the University Library.
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Mode of access: Internet.
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Includes bibliography.
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Mode of access: Internet.
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Sponsors of the study: Boeing Airplane Company and others.
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Mode of access: Internet.
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Cover title.
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Reprinted from eighteenth Annual report, Michigan academy of science, December 1916.