Survey study for Great Lakes and St. Lawrence Seaway navigation season extension
Subtitle: draft.
Contributors: United States. Army. Corps of Engineers. Detroit District.
Publisher: U.S. Army Engineer District, Detroit, Corps of Engineers
Published: 1979
Place of publication: Detroit, Mich
Language: eng
Subjects: Navigation -- Great Lakes.; Navigation -- Saint Lawrence Seaway.; Ice navigation.
Notes: Cover title.

"March 1979."

Includes bibliographical references.
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