General plan showing navigational aids of the St. Lawrence Seaway.
| Corporate Author: | |
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| Format: | Map |
| Published: |
[Place of publication not identified] :
St. Lawrence Seaway Authority,
[1960?]
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| Subjects: |
| Item Description: | Cartographic material. |
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| Physical Description: | 2 maps ; 24 x 122 cm. |