00386nam a2200157Ia 4500008004100000020001800041035001000059082001600069100001700085245005900102250000600161260003800167300000800205500000900213650000600222210723s9999||||xx |||||||||||||| ||und||  a81-7319-171-9  a35062  a517.38BAMA  aAmarnath, T. 3aAn Elementary Course In Partial Differential Equations  a-  aN. DelhibNarosa Publishing House  a135  a1968  a-