1993. 2011-11-15T21:01:13Z. 2015-10-21T15:05:40Z. U.S. Coast and Geodetic Survey. The Survey. English. Public. Saint Lawrence River and Saint Lawrence Seaway.
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1989. 2011-11-15T20:54:21Z. 2015-10-21T15:05:40Z. United States. National Ocean Service. The Service. English. Public. Saint Lawrence River and Saint Lawrence Seaway.
1992. 2011-11-15T20:55:10Z. 2015-10-21T15:05:40Z. United States. National Ocean Service. The Service. English. Public. Saint Lawrence River and Saint Lawrence Seaway.
1989. 2011-11-15T20:16:11Z. 2015-10-21T15:05:39Z. United States. National Ocean Service. The Service. English. Public. Saint Lawrence River and Saint Lawrence Seaway.
1993. 2011-11-15T20:12:13Z. 2015-10-21T15:05:39Z. United States. National Ocean Service. The Service. English. Public. Saint Lawrence River and Saint Lawrence Seaway.
1989. 2011-11-15T21:06:53Z. 2015-10-21T15:05:40Z. United States. National Ocean Service. The Service. English. Public. Saint Lawrence River and Saint Lawrence Seaway.
1992. 2011-11-15T21:07:46Z. 2015-10-21T15:05:40Z. United States. National Ocean Service. The Service. English. Public. Saint Lawrence River and Saint Lawrence Seaway.