1. Optimal international promotion expenditure for differentiated products Collection: Agricultural Communications Documentation Center (ACDC) Contributers: Goddard, E.W. (author) and Conboy, P. (author) Format: Journal article Publication Date: 1993 Published: International Location: Agricultural Communications Documentation Center, Funk Library, University of Illinois Document Number: C14807 Journal Title: Review of Marketing and Agricultural Economics Journal Title Details: 61(1) : 49-62