Designing health communication campaigns : what works? / Thomas E. Backer, Everett M. Rogers, Pradeep Sopory. Backer, Thomas E. Rogers, Everett M. Sopory, Pradeep. Mass media in health education. Communication in medicine. RA440.55 .B33 1992 362.1014 22 BAD Includes bibliographical references (p. 177-179). Newbury Park, Calif. : Sage, c1992. c1992. 1992 Text xv, 181 p. : http://www.loc.gov/catdir/enhancements/fy0655/92006165-d.html http://www.loc.gov/catdir/enhancements/fy0655/92006165-t.html eng