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Growth Response of Seedling Yellow Birch to Humus-mineral Soil Mixtures

Carl H. TubbsRobert R. Oberg

出版	U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station, 1966
URL	http://books.google.com.hk/books?id=Sjk60QEACAAJ&hl=&source=gbs_api