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Upper Klamath River Canyon of Oregon and California
註釋"This project was to research and write an assessment of the historical landscape of the Upper Klamath River Canyon from the vicinity of Klamathon, California, to Keno, Oregon. The project area included the Pokegama Plateau and watersheds of Fall Creek and Jenny Creek north of the Klamath River as well as the country lying south of the river from Dorris to Ager, California. The primary focus, however, was the course of the Klamath River where it cuts through the Cascade Range to wend its way through northwestern California to the Pacific Ocean." -- Introduction.