00270nam a2200121Ia 4500008004100000082001100041082001000052100001600062245002500078260001100103260002500114260000900139230118s9999||||xx |||||||||||||| ||und||  a512.94  bKHA/T  am.lbkhanna 0atheory of equations   ameerut  bjaiprakash nath &co   c1955