00261nam a2200109Ia 4500008004100000082002100041100001800062245001800080250000900098260003600107300000800143240913s9999||||xx |||||||||||||| ||und||  a512.943 4  LEW/M  aDavid W Lewis 0aMatrix Theory  aNULL  bAllied PublishersaMumbaic2009  a298