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Seed Cone Production Enhanced by Injecting 38-year-old Larix Occidentalis Nutt. with GA 4/7

Raymond C. Shearer

出版	U.S. Department of Agriculture, Forest Service, Intermountain Research Station, Forestry Sciences Laboratory, Northern Region, 1994
URL	http://books.google.com.hk/books?id=m4TXuQEACAAJ&hl=&source=gbs_api