00321nam a2200133Ia 4500082001900000100001600019245003700035250000800072260003600080300001900116490004200135500000500177700000500182  a515.35bJ65.PD  aJohn, Fritz  aPartial differential equationsb  a4th  aNew YorkbSpringer-Verlagc1982  ax, 249p. Index  aApplied Mathematical Sciences v v. 1  a  a