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The Impact of the Hemlock Loopers, Lambdina Fiscellaria (Guenée) and L. Athasaria (Walker) on Eastern Hemlock and Balsam Fir in New England

Henry TrialMichael E. Devine

出版	Me. Forest Service [i.e. Bureau of Forestry], 1995
URL	http://books.google.com.hk/books?id=_7AsAQAAMAAJ&hl=&source=gbs_api