Ewing, George M.  <br/><br/>
Calculus of Variations With Applications 
/ by George M. Ewing 
 - New York:  Dover Publications,  2003. 
 - vii, 343p. 
<br/><br/><label>ISBN: </label>9780486648569 
<br/><br/><label>Dewey Class. No.: </label>515.64  / EWI/C