title: On evaluating mass media's impact.
authors.forename: T W
authors.initials: TW
authors.lastname: Valente
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control*; D006266:Health Education / Q000592:standards*; D006801:Humans; D008402:Mass Media / Q000706:statistics & numerical data*; D015397:Program Evaluation / Q000592:standards*; D011845:Radio; D015024:Zambia