Langdon, Danny G. The adjunct study guide Danny G. Langdon. - Englewood Cliffs, N.J. Educational Technology Publications c1978. - ix, 88 p. - The Instructional design library v. 1 . 920909 Bibliography: p. 75-76. ISBN: 0877781052 7.95 LCCN: 77025457 Subjects--Topical Terms: Independent studyStudy skills LC Class. No.: LB1049 / .L35 Dewey Class. No.: 378.1/7/943