00372nam a2200121Ia 4500008004100000041001200041082002100053100002000074245007600094260003400170300001500204400003100219231217s9999    xx            000 0 und d  aEnglish  a515.35  PIA:3  R  aPiaggio, H T M. 3aAn elementary treatise on differential equations and their applications  c1962bOrient longmansaBombay  axviii, 256  aBell's mathematical series