TY - BOOK AU - Webster,Arthur Gordon AU - Plimpton,Samuel James TI - Partial differential equations of mathematical physics U1 - 515.353 23 PY - 1955/// CY - New York, Leipzig PB - G.E. Stechert, B.G. Teubner KW - Differential equations, Partial KW - Mathematical physics N1 - Includes bibliographical references ER -