The ports of Duluth-Superior, Minn. and Wis., Two Harbors, Minn., and Ashland, Wis.
By: prepared by the Board of Engineers for Rivers and Harbors.
Series: Lake series ;; no. 9 (revised 1949); Lake series (United States.  Board of Engineers for Rivers and Harbors) ;; no. 9 rev. 1949.
Publisher: U.S. G.P.O.
Published: 1950
Place of publication: Washington
Language: eng
Number of pages: 187
Subjects: Harbors -- Superior, Lake; Harbors -- Minnesota -- Duluth; Harbors -- Wisconsin -- Superior; Harbors -- Minnesota -- Two Harbors; Harbors -- Wisconsin -- Ashland
Notes: "Revision of Lake series no. 6 ... published in 1939 ... covered only the port of Duluth-Superior."