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Time and Materials Needed to Survey, Inject Systematic Fungicides, and Install Root-graft Barriers for Dutch Elm Disease Management
William N. Cannon
Jack H. Barger
Northeastern Forest Experiment Station (Radnor, Pa.)
出版
U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station
, 1986
URL
http://books.google.com.hk/books?id=-lwIzQEACAAJ&hl=&source=gbs_api