Nikolsky, Alexander A. <br/><br/>
Notes Helicopter Design Theory 

 - Princeton :   Princeton University Press,   1945. 
 - p. 228 
<br/><br/><label>Subjects--Topical Terms: </label><br/>HELICOPTEROS<br/>DISEŅO DE HELICOPTEROS<br/>VUELO VERTICAL<br/>PERFORMANCE<br/>ESTABILIDAD ESTATICA
<br/><br/><label>Universal Decimal Class. No.: </label>629.735.4