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This is the story of the St. Lawrence Seaway, its construction, its operation and its impact on our economy. It gives a brief historical review of the earlier canals, which were built as long as two hundred years ago. (A short version, entitled From Ocean to Prairie, is also available. 11:52, 106C 0186 015.)

1975, 29 min 47 s

Jusqu'au coeur d'un continent