Gross, M. Introduction to formal grammars / by M. Gross and A. Lentin. With a preface by Noam Chomsky ; translated by M. Salkoff. - London : George Allen & Unwin, 1970. - ix, 231 p. : ill. ; 26 cm. Translation of Notions sur les grammaires formelles. Bibliography : p. 229-231. engfre Subjects--Topical Terms: Formal languages.