Ali Hasan Nayfeh <br/><br/>
Introduction to perturbation techniques ,(chapter 1-11) 

 - VOL-1 
 - USA  JOHN WILEY & SONS  1993 
<br/><br/><label>ISBN: </label>0471310131 
<br/><br/><label>Dewey Class. No.: </label>515.35 NAY