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Studies of Combined Sprays for Destroying the Overwintering Eggs of the European Red Mite and Apple Aphids at the Delayed Dormant Period of the Apple Tree

Thomas J. Headlee

出版	New Jersey Agricultural Experiment Station, 1929
URL	http://books.google.com.hk/books?id=3ywiAQAAMAAJ&hl=&source=gbs_api