Alexander, L. G. Developing skills : an integrated course for intermediate students; illustrations by Michael ffolkes, Graham and Gus. - London, Longmans, 1967. - xiv, 145 p. : illus ; 25 cm. - New concept English . LCCN: 67111270 Nat. Bib. No.: GB67-17933 Subjects--Topical Terms: English grammar.Readers. LC Class. No.: PE1121 / .A38 Dewey Class. No.: 420 / ALE