Citation: Jd. Leckenby et H. Kim, HOW MEDIA DIRECTORS VIEW REACH FREQUENCY ESTIMATION - NOW AND A DECADE AGO, Journal of advertising research, 34(5), 1994, pp. 9-21
Citation: Jd. Leckenby, ROADS TO BE TAKEN - THE INTELLECTUAL ODYSSEY OF SANDAGE,CHARLES,H. - SANDAGE,CH, Journal of advertising, 22(4), 1993, pp. 119-121