Principles of design and operation of modified helicopter designated helicostat, based on 8 yr study of flight of birds. (See also Acade Mie des Sciences -- C R v 206 n 19 May 9 1938 p 1355-7)
Les enseignements du vol naturel, etc
Les enseignements du vol naturel, etc
Genie Civil ; 112 , n 2914
1938
2 pages
Article (Journal)
French
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Les enseignements du vol naturel, etc
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