00369nam a2200157Ia 4500008004100000020000900041035001000050082001600060100001700076245005000093250000600143260003800149300000800187500001000195650000600205210723s9999||||xx |||||||||||||| ||und||  aNULL  a34153  a517.38BDUT  aDutta, B. K. 0aIntroduction To Partial Diferential Equations  a-  aCalcuttabNew Central Book Agency  a161  a11084  a-