Bush, Alan W. <br/><br/>
Perturbation methods for engineers and scientists. 

 - Boca Raton :  CRC Press,  1992. 
 - xii, 303 p. 
<br/><br/><label>ISBN: </label>0849386144 :  GBP 62.99 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Perturbation (Mathematics)
<br/><br/><label>LC Class. No.: </label>QA871  / .B87