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Flowering and Seed Production in Seven Hardwood Species

Ted J. GrisezNortheastern Forest Experiment Station (Radnor, Pa.)

出版	Forest Service, U.S. Department of Agriculture, Northeastern Forest Experiment Station, 1975
URL	http://books.google.com.hk/books?id=7YtY0AEACAAJ&hl=&source=gbs_api