00310nam a2200121Ia 4500008004100000020001500041041001200056100001500068245004200083260003600125300000800161650001900169221030s9999    xx            000 0 und d  a8170089395  aEnglish  aN. P. Bali 0aDifferential Equationscby N. P. Bali  bFirewall MediaaNew Delhic2015  a548  aBE Mathematics