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- Received for publication: 9/22/91. Scientific Article No. A4930. Contribution No. 7973 of the Maryland Agricultural Experiment Station. As partial fulfillment of M.S. degree for senior author.
- Research Assistant. Present address: Grace‐Soerra Horticultural Products 6656 Grant Way, Allentown, PA 18106–9316.
- Professor of Horticulture.
- Fromer Assistant Professor of Horticulture. Present address: 48 Brundrett Ave., Andover, MA 01810.