Factors influencing the abscission of flowers and partially developed fruits of the apple Heinicke, Arthur John. creator text book Ithaca, N.Y 1917 1917
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ENG Abscission (Botany) Apples SB363 .H4 https://www.biodiversitylibrary.org/bibliography/36986 19006819 10.5962/bhl.title.36986 DLC