The port of Duluth-Superior, Minn. and Wis.
By: prepared by the Board of Engineers for Rivers and Harbors, War Department.
Edition: Rev. 1939
Series: Lake series -- no. 6
Publisher: U.S. G.P.O.
Published: 1940
Place of publication: Washington
Language: eng
Number of pages: 153
Subjects: Harbors -- Minnesota -- Duluth.; Harbors -- Wisconsin -- Superior.; Harbors -- Superior, Lake.
Notes: At head of title: War Department. Corps of Engineers, United States Army.