00525nam a22001697a 450000500170000001000150001702000260003203500130005803700130007108200120008410000260009624500620012226000340018427000720021830000250029050000400031520150710114808.0  aENG-113263  c325.00a9788120350434  aEN-96795  bDBAD/PUB  a515.353  aBiswal, Purna Chandra  aPartial differential equations /cby Purna Chandra Biswal  aNew DelhibPHI Learningc2015  aRimjhim House, 111, Patparganj Industrial EstatebNew Delhie110092  avii,255p.c24cm(pbk)  aIncludes bibliographical references