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1Published 1919### CRL customization ### ?> ### Add publisher and desc details ### ?>Washington, D.C., Govt. Print. Off., 1919.446 p. incl. illus., forms. col. front., plates, ports., facsims., tables (1 fold.) diagrs. 27 cm.Subjects: “...Aeronautics, Military United States....”
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2Published 1944### CRL customization ### ?> ### Add publisher and desc details ### ?>[Washington] Association of American Railroads, Railroad Committee for the Study of Transportation (Subcommitte on Air Transport) 1944.63 p. illus. (incl. maps) diagrs. 28 x 22 cm.Subjects: “...Aeronautics, Commercial United States....”