Nayfeh, A H <br/><br/>
Perturbation methods 
A H Nayfeh                                                 
 - New York  John Wiley & Sons  1973 
 - xii, 425p. 
<br/><br/><label>ISBN: </label>0-471-63059-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>NASA Thesaurus<br/>Perturbation
<br/><br/><label>Universal Decimal Class. No.: </label>517.9  / NAY