Mark W. FreemanDepartment of Pomology, University of California, Davis, CA 95616
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George C. Martin
George C. MartinDepartment of Pomology, University of California, Davis, CA 95616
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Contributor Notes
Received for publication August 18, 1980.
The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.