Von Oech, Roger A whack on the side of the head : how to unlock your mind for innovation / Roger von Oech ; foreword by Nolan Bushnell ; illustrated by George Willett - Warner Books ed. - New York, NY : Warner Books , c1983. - xvii, 141 p. : ill. ; 27 cm. Includes index. Bibliography: p. 138-139. ISBN: 0446380008 (pbk.) LCCN: 83012489 Subjects--Topical Terms: Creative thinkingSuccess---Psychological aspects LC Class. No.: BF408 / .V58 1983 Dewey Class. No.: 153.35 VON