00318nam a2200109 a 450000500170000000800410001704100080005810000170006624500720008326400420015530000110019720260716125008.0260701s1979    ii            000 0 eng d  aeng1 aGupta, Malik10aCalculus of finite difference & numerical analysis /cGupta, Malik. 1aMeerut :bKrishna Publication,c1979.  a384 p.