Some problems in using diffusion models for new products / by Irwin Berhardt and Kenneth D. Mackenzie.
- Philadelphia, Pa. : Dept. of Industry, Wharton School of Finance & Commerce, University of Pennsylvania, 
- Working paper (Wharton School. Dept of Industry) ; no. 76.
Working paper / Dept. of Industry, Wharton School of Finance & Commerce, University of Pennsylvania ; no. 76
56 leaves : ill. ; 28 cm.
- "January 1968."
Includes bibliographical references.
- Mackenzie, Kenneth D.
Wharton School. Dept. of Industry.
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