Crystal, David Linguistics. - [Harmondsworth] Penguin [1974] - 267 p. illus. - A Pelican original Pelican books . Bibliography: p. [260] ISBN: 0140213325 (ed. 1971) LCCN: 91175362 Nat. Bib. No.: B71-28473 Subjects--Topical Terms: Linguistics LC Class. No.: P121 / .C68 Dewey Class. No.: 410