00349nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001400084245006500098260002500163300000800188650001900196221030s9999    xx            000 0 und d  a8120309790  aEnglish  a105.23bRao  aK. S. Rao 0aIntroduction To Partial Differential Equationscby K. S. Rao  bPHIaNew Delhic1997  a357  aBE Mathematics