Bozena BorkowskaResearch Institute of Pomology, 96-100 Skierniewice, Poland
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L. E. Powell
L. E. PowellDepartment of Pomology, Cornell University, Ithaca, NY 14853
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Contributor Notes
Received for publication June 2, 1978.
The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper must therefore be hereby marked advertisement solely to indicate this fact.