1. Management of New Products (Chicago, IL: Booz, Allen, and Hamilton, 1968), especially pp. 11–12. [Includes results of studies of industry practices.]
2. MacDonaldMorgan B.Jr., Appraising the Market for Industrial Products (New York: National Industrial Conference Board, 112 pp.). [A study of the practices and experiences of around 100 U.S. and Canadian firms.]