John, Fritz <br/><br/>
Partial differential equations 
by Fritz John 
 - 3rd ed. 
 - New Delhi  Narosa Publishing House  1979 
 - vii, 198p.;  22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dofferential equations,partial
<br/><br/><label>Dewey Class. No.: </label>515.353  / JOH