Bellman, Richard <br/><br/>
Perturbation techniques in mathematics, engineering and physics 
Richard Bellman 
 - Mineola  Dover Publications, Inc.  1966 
 - viii, 118p. 
<br/><br/><label>ISBN: </label>9780486432588 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Perturbation (Mathematics)
<br/><br/><label>Dewey Class. No.: </label>515.392 B417p