Mackin, Ronald. Liberal studies / Ronald Mackin, William F. Hawkins. - London : Oxford University Press, c1967. - xi, 164 p. : 21 cm. - English studies series ; v. 4 . ISBN: 0194377156 Subjects--Topical Terms: English language--Study and teaching.English language--Technical English. Dewey Class. No.: 428.2 / M159