00266nam a2200109Ia 4500008004100000041000800041082001400049100002000063245004000083260002600123365000700149230303s9999    xx            000 0 und d  aeng  a515.3 PIS  a/ PISKUNOV (N):  aDifferential and Intergral Calculus  aNew DelhibVikas Pub.  cRS