00344 a2200121 4500020001500000082001500015100002200030245005700052260004500109300002200154650002300176700002300199 a8185015961 a511.3bHOP aHopcroft, John E. aIntroduction automata theory, languages, computation aNew DelhibNarosa publishingc1979g1987 axii, 418p.c23cm. aMathematical logic aUllman, Jeffrey D.