"The Oregon country, 1810-1830 : a chapter in territorial expansion."; "Ambler, Charles Henry, 1876-1957."; "United States--Territorial expansion.", "Northwest, Pacific--History."; "Ambler, Charles Henry, 1876-1957."; "1943"; "

Journal article reprint from: Mississippi Valley Historical Review, v.30:no.1 (1943:June).

"; ""; "P1303"; "pec"; "Northwest, Pacific--History.", "United States--Territorial expansion."; "14256"; .