Ginsburg, Seymour, 1927- Studies in abstract families of languages / by Seymour Ginsburg, Sheila Greibach, John Hopcroft. - 1 online resource (58 pages). - Memoirs of the American Mathematical Society ; number 87 . - Memoirs of the American Mathematical Society ; no. 87. . Cover title. Includes bibliographies. ISBN: 9781470400361 (e-book) Subjects--Topical Terms: Machine theory.Computer programming.Robots. Index Terms--Genre/Form: Electronic books. LC Class. No.: QA267 / .G56 1969