00272nam a2200109Ia 4500008004100000041000800041082001900049100001500068245006200083260000900145300000800154211209s1975    xx            000 0 und d  aeng  a515.62 N75 SAX  aSAXENA H C  aEXAMPLES IN INFINITE DEFFERENCES AND NUMERICAL ANALYSIS.   c1975  a322