Great progress in aviation shown by present-day planes, airways, regulations; functions of Aeronautics-Branch of Department of Commerce explained; present-day flying divided into three classes: air transport, commercial and private air service; improvements in modern plane; great development in airport facilities; state cooperation needed.
Commercial aviation in the United States
Yale Sci. Mag
Yale Scientific Magazine ; 2 , n 4
1928
Aufsatz (Zeitschrift)
Englisch
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