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Cone Serotiny of Lodgepole Pine Near Island Park, Idaho

James E. Lotan

出版	Intermountain Forest & Range Experiment Station, Forest Service, U.S. Department of Agriculture, 1968
URL	http://books.google.com.hk/books?id=JK9YQ0n5_NwC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN