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Factors Influencing the Abscission of Flowers and Partially Developed Fruits of the Apple (Pyrus Malus L.)

Arthur John HeinickeHerbert Andrew HopperWalter Hagemeyer BurkholderElmer Eugene BarkerHarry Hazelton KnightLeonard Amby Maynard

出版	Cornell University, 1917
URL	http://books.google.com.hk/books?id=KsFQAQAAMAAJ&hl=&source=gbs_api