United States. War Department. (1926). Duluth-Superior Harbor: Statistical report of marine commerce of Duluth, Minn., and Superior, Wis. for calendar year 1926; with supplementary report of commerce of Keweenaw Waterway, Mich. GPO.
Chicago Style (17th ed.) CitationUnited States. War Department. Duluth-Superior Harbor: Statistical Report of Marine Commerce of Duluth, Minn., and Superior, Wis. for Calendar Year 1926; with Supplementary Report of Commerce of Keweenaw Waterway, Mich. [Washington]: GPO, 1926.
MLA (9th ed.) CitationUnited States. War Department. Duluth-Superior Harbor: Statistical Report of Marine Commerce of Duluth, Minn., and Superior, Wis. for Calendar Year 1926; with Supplementary Report of Commerce of Keweenaw Waterway, Mich. GPO, 1926.
Warning: These citations may not always be 100% accurate.