Alexander, L. G. Practice and progress: an integrated course for pre-intermediate students / L. G. Alexander. - 1st ed. - London : Longmans, 1970 . - xxii, 232 p : illus. 25 cm. - New concept English . ISBN: 058252330 3 Subjects--Topical Terms: English language--Textbooks for foreign speakers LC Class. No.: PE1128.A2 Dewey Class. No.: 428