Aeronautics Branch of Department of Commerce described; work divided into air regulations, airways, information, and research; 8000 mi. of airways surveyed and lighted; 14,131 mi. under its jurisdiction; licenses for pilots and mechanics; investigation of crashes by Accidents Board; summary of accidents analyzed from Jan. 1 to July 1, 1928.
The work of the aeronautics branch of the U. S. department of commerce
Aeroplane
Aeroplane ; 35 , n 25
1928
Aufsatz (Zeitschrift)
Englisch
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United States. Aeronautics branch of the department of commerce
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