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Examination of Ruffed Grouse Populations and Habitat Requirements in the Turtle Mountains
出版
North Dakota State Game and Fish Department, Pittman-Robertson Division, Project W-67-R-17, Phase B, Game Bird Investigations, Study no. B-XIV
, 1982
URL
http://books.google.com.hk/books?id=iZcsAQAAMAAJ&hl=&source=gbs_api