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of old-growth forests in California, Oregon, and Washington (PDF). 美国国家森林局, Pacific Northwest Research Station. 1993 [2018-02-18]. Resource Bulletin
Salem, Oregon. [March 25, 2018]. （原始内容存档于2018-04-09）. The Creeks of Salem. Salem Online History. [January 31, 2008]. （原始内容存档于2007-12-13）. Station: SALEM
Area of old-growth forests in California, Oregon, and Washington (PDF), 美国国家森林局、Pacific Northwest Research Station, 1993 [2018-02-25], Resource Bulletin PNW-RB-197
科基爾（英語：Coquille）位於美國奧勒岡州，科基爾河（英语：Coquille River (Oregon)）河畔，是庫斯縣的縣治。依據2020年美國人口普查人口有4,015人。 Census Data: Coquille (city). United States Census Bureau.
Service. 1999. Draft Recovery Plan for the Giant Garter Snake. Portland, Oregon. U.S. Fish & Wildlife Service. 1993. Endangered and Threatened Wildlife