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Effects of an Aerial Application of Urea Fertilizer on Young Spruce and Western Hemlock at Thomas Bay, Alaska
Wilbur A. FarrA. S. HarrisSpencer Israelson
出版Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1977
URLhttp://books.google.com.hk/books?id=yfUTAAAAYAAJ&hl=&source=gbs_api
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