00303nam a2200109Ia 4500082002000000100004200020245003700062260003500099300002000134500000500154700003400159  a515.35bP911.PD  aPrasad, Phoolan and Ravindran, Renuka  aPartial differential equationsb  aNew DelhibWiley Easternc1985  axi, 252p. Index  a  aRavindran, Renuka ; jt. auth.