Siebert, Al. Student manual to accompany Understanding human behavior / Al Sie bert and Timothy Walter. - New York : Holt, Rinehart and Winston, Inc., 1974 - 176 p. : ill. ; 24 cm. Includes bibliographical references. ISBN: 0030078261 Subjects--Topical Terms: Human behavior -- Problems, exercises, etc. Dewey Class. No.: 150