Symons, T. W., & Downing, A. (1882). Report of an examination of the upper Columbia River and the territory in its vicinity in September and October, 1881: To determine its navigability, and adaptability to steamboat transportation. G.P.O..
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Symons, T. W., và Alfred Downing. Report of an Examination of the Upper Columbia River and the Territory in Its Vicinity in September and October, 1881: To Determine Its Navigability, and Adaptability to Steamboat Transportation. Washington [D.C.]: G.P.O., 1882.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Symons, T. W., và Alfred Downing. Report of an Examination of the Upper Columbia River and the Territory in Its Vicinity in September and October, 1881: To Determine Its Navigability, and Adaptability to Steamboat Transportation. G.P.O., 1882.