Survey study for Great Lakes and St. Lawrence Seaway navigation season extension :
prepared by the U. S. Army Corps of Engineers, Detroit District.
|Corporate Author:||United States.|
Detroit : U.S. Army Engineer District, Detroit, Corps of Engineers, 1979.
Navigation > Saint Lawrence Seaway.
Navigation > Great Lakes.
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|Item Link||Original Source|
|Full viewv.1||University of Illinois at Urbana-Champaign|