00285nam a2200121Ia 4500008004100000041000800041082001200049100001400061245002500075260004400100300000900144650001000153230817s2001    xx            000 0 und d  aeng  a160/KEL  aJohn Kely  aThe Essence of Logic  aNew DelhibPrentice Hall of Indiac2001  a258p  aLOGIC