Ginsburg, Seymour, 1927- The mathematical theory of context free languages. - New York: McGraw-Hill, [1966]. - xii, 232 p.: illus., 23 cm. Bibliography: p. [219]-224. LCCN: 66014805 Nat. Bib. No.: GB67-5675 Subjects--Topical Terms: Formal languages.Sequential machine theory Dewey Class. No.: 001.5 / G493m