Prasad, Phoolan <br/><br/>
Partial differential equations 

 - Delhi  Wiley Eastern Limited  1987 
 - xi, 252p., 22 cm. 
<br/><br/><label>ISBN: </label>0852267223 
<br/><br/><label>Dewey Class. No.: </label>515.35,  / DD, Pra