John, F <br/><br/>
Partial Differential Equations (Applied Mathematical Science 

 - 4th ed 
 -  Springer Verlag New York  1991 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential Equations, Partial
<br/><br/><label>Dewey Class. No.: </label>515.353/Joh