996 resultados para United States. Dept. of the Air Force.
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Mode of access: Internet.
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Published also as thesis (PH. D.) Columbia University, 1917.
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"December 1987"--P. i.
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"May 1988."
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"March 1977."
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"February 1979."
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"May 1992."
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"June 1972."
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"June 1975."
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Mode of access: Internet.
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Errata slips inserted.
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January 1971.
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April 1969
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Includes index.
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Includes index.