Willis, Hulon. Introductory language study / - 1st ed. - Cambridge : Schenkman Pub. Co., [c1970] - 151 p. illus. 23 cm. Includes bibliographical references. ISBN: 0713534781 LCCN: 70135341 Subjects--Topical Terms: English language--Study and teaching (Higher) LC Class. No.: PE1065 / .W45 Dewey Class. No.: 420