00645nam a22002051  45000010005000000030008000050050017000130080039000300350018000690400036000870410011001230820022001341000030001562450075001862500031002612600044002923000027003365040039003636500037004027305BD-RjUL20211208234409.0140113s1964    nyu      b    001 0 eng  a(BD-RjUL)7348  aDLC/ICUcICUdDLCdBD-RjULbeng1 aengger00a517.383bHEP 19641 aHellwig, Günter,d1926-10aPartial differential equations :ban introduction /cGünter Hellwig.  a1st English translated ed.  aNew York :bBlaisdell Pub. Co.,cc1964.  axiii, 263 p. ;c26 cm.  aIncludes bibliographies and index. 0aDifferential equations, Partial.