00257    a2200109   4500020001500000082001300015100001900028245002600047260004200073300002200115650001000137  a8120311906  a160bKEL  aKelly, John J.  aThe essence of  logic  aNew DelhibPrentice- Hallc1997g1997  axiv, 256p.c22cm.  aLOGIC