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The Effects of Spruce Budworm Outbreaks on Trees and Shrubs

Bruce A. MontgomeryGary A. SimmonsJohn A. WitterAnn M. Lynch

出版	Michigan Cooperative Forest Pest Management Program, 1983
URL	http://books.google.com.hk/books?id=6bhsnQAACAAJ&hl=&source=gbs_api