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Determining Airplane Altitude by Radio Echo diag.
Publication: Purdue Engineer
Subject: Alexanderson, E.F.W.
Date: 2/1929
vol. 24, No. 4 p. 115
Publication: Purdue Engineer
Subject: Alexanderson, E.F.W.
Date: 2/1929
vol. 24, No. 4 p. 115