Gessow, Alfred. <br/><br/>
Aerodynamics of the helicopter 

 - New York :   The Macmillan Company,   1952. 
 - p. 343 
<br/><br/><label>Subjects--Topical Terms: </label><br/>HELICOPTEROS<br/>AERODINAMICA<br/>PERFORMANCE<br/>AUTO-ROTACION<br/>ROTOR<br/>ESTABILIDAD<br/>VIBRACIONES
<br/><br/><label>Universal Decimal Class. No.: </label>629.735.4