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|Additional Physical Format:||Online version:
Lyon, Thoburn C. (Thoburn Cassady), 1896-1974.
Practical air navigation.
Annapolis, Md., Weems System of Navigation 
|All Authors / Contributors:||
Thoburn C Lyon
|Notes:||"The first edition of Practical air navigation was issued in 1935 as a ... Special publication of the Coast and Geodetic Survey ... In 1940 it was issued as Civil aeronautics bulletin, no. 24."|
|Description:||297 pages illustrations 22 cm|