Gesson, Alfred. <br/><br/>
Aerodynamics of the helicopter / 
Alfred Gessow, Garry C. Myers. 
 - New York, N.Y. :  Frederick Ungar Publishing Co. :  1967. 
 - 343 p. : ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering.