Theroy of flight of helicopters/ 
Indian Institute of Aeronautics and Aviation Electronics 
 - Delhi:  Cambridge Printing Works,  1958 
 - xi, 34 p.:  plates;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Flight<br/>Aerodynamics<br/>Airplanes<br/>Navigation (Aeronautics)<br/>Airplanes--Motors<br/>Helicopters
<br/><br/><label>Dewey Class. No.: </label>629.132