Procedure of airways division of Dept. of Commerce in locating and establishing landing fields between airports on airways; ground markers, beacons and signal lights; boundary markers and obstruction lights; route-designation signs; and other provisions made for guidance and safety of pilots.
Department of Commerce national airways engineering
Soc. Automotive Engrs. -- Jl
Society of Automotive Engineers -- Journal ; 21 , n 5
1927
5 pages
7 Figs.
Aufsatz (Zeitschrift)
Englisch
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