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Did the Federal Trade Commission's advertising substantiati..:

, In: The American economic review / publ. by the American Economic Association
Sauer, Raymond D. ; Leffler, Keith B.. (1990)  1 - p. 191-203
Exemplar:  Zentrale:E02 z vwl 001 jc/649; Zentrale:Magazin Zs fc 1649