00269nam a2200109Ia 4500008004100000041000800041082000800049100001500057245003300072260004600105300000800151211209s1980    xx            000 0 und d  aeng  aSHA  aSHARMA M M  aLINEAR DIFFERENCE EQUATIONS   aNEW DELHIbKRISHNA PRAKASHAN MANDIRc1980  a144