00535nam a2200169 a 450000500170000002000150001708200210003210000190005324500730007226000550014530000180020069000270021896400190024599700180026499900170028295200660029920251203092001.0  a8120309790  a515.353,bD, san  aSankara Rao, K  aIntroducation to partial differential equations, K. Sankara Rao, eng  aNew Delhi, Prentice Hall of INew Delhiia, Inc1995  ax,357p.c22cm  aEifferential equations  bEngcdefg_  a82161 LIBSC C  c59818d59818  00104070aPUbPUd1998-07-16l0o515.353, D, sanp82161yBK