Zachmanoglou, E C <br/><br/>
Introduction to partial differential equations with applications 

 - New York  Dover  1986 
 - x, 405p.  
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>486652513 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations<br/>Mathematics -- Calculus<br/>Partial differential equations