Greenspan, Donald  . <br/><br/>
Introduction to partial differential equations /  
by Donald Greenspan. 
 - New York :   Dover Publications, INC. ,   1961 
 - 195p :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B334  / K1;3