Chafee, Steven Henry, 1935- Two sources of value change salience and pertinence/ [microform] : Steven Henry Chaffee - Ann Arbor, Mich. : University Microfilms International, 1965 - 1 microfilm reel : positive ; 35 mm. Thesis (Ph.D.) - Stanford University, 1965 ISBN: Y910041267 Subjects--Topical Terms: Communication--Research