Clark, Raymond C., 1937-, Language teaching techniques /by Raymond C. Clark ; illustrations by Patrick R. Moran. - second, revisedition. edition. - Brattleboro, Vermont : Pro Lingua Associates, (c)1987. - viii, 120 pages : illustrations ; 24 cm. LCCN: Subjects--Topical Terms: Communicative competence--Study and teaching. LC Class. No.: PB35 / .L364 1987 PB35