00254nam a2200121Ia 4500100001800000250000700018654001300025245002400038260003400062082001500096300000900111546001200120  aBallaney/P.L   a18  aMachines  aTheory Of  Machines  bKhanna publishersaNONEc1992  a621.8bBAL  a1484  aENGLISH