Sudoc Stem: FAA 3.11/2 - Blacklight Search Results

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1. IFR altitude usage peak day 1960; [prepared by Eleanor Drown with assistance of Augusta Galbreath and Margaret B. Smyser].

Corporate/Agency Authors:: Air Traffic Management Bureau and Federal Aviation Agency
Publisher:: Air Traffic Management Bureau
Date:: [1961.]
SuDoc number:: FAA 3.11/2:960