00684    a2200181   4500003000500000005001700005010001100022040000900033082001500042100001600057245006500073250002000138260003200158300001100190505025700201600001800458650002600476Nust20221121114139.0  a566972  cNust  a515.35,SNE  aIan Sneddon  aElements of Partial Differential Equation / c Sneddon,Ian N  aStudent edition  aNew YorkbMcGraw Hillc1957  ax,327p  aOrdinary Differential Equations In More Than Two Variables (Page-1),  Partial Differential Equations Of The First Order (Page-44), Partial Differential Equations Of The Second Order (Page-88),  Laplace Equation (Page-141), The Wave Equation (Page-209).  aIan N.Sneddon  aDifferential Equation