Members of the Association of National Advertisers, who held their 17th annual convention in Detroit last week, must decide each year when they make up their advertising appropriations, what magazines and newspapers they will use. The number and type of readers* are important factors. Bothered yearly by such problems, the National Advertisers asked O. C. Harn to give them his ideas. He is managing director of the Audit Bureau of Circulation (A. B. C.), the organization that verifies a publisher's statement of his net paid circulation. Said Mr. Harn: "Don't be afraid to...
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