Hopcroft, John E., 1939- Formal languages and their relation to automata / John E. Hopcroft, Jeffrey D. Ullman. - vii, 242 pages : illustrations ; 24 cm. - Addison-Wesley series in computer science and information processing . LCCN: 69014297 Subjects--Topical Terms: Formal languagesMachine theory Subjects--Index Terms: Autómatas Lenguaje formal LC Class. No.: QA267.3