00299nam a2200109Ia 4500008004100000082001500041100001500056245005800071250000900129260004300138300000800181190710s9999    xx            000 0 und d  a517.6 g959  aGupta, P P 0aCalculus of finite differences and numerical analysis  a21st  aMeerutbKrishna Prakashan Mandirc1995  a568