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R. J. Ryan
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Physical geology of Canada [supplement to] Understanding earth, third edition / Frank Press, Raymond Siever
R. J. Ryan
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![Physical geology of Canada [supplement to] Understanding earth, third edition / Frank Press, Raymond Siever](https://covers.openlibrary.org/b/id/11694813-M.jpg?default=false "Physical geology of Canada [supplement to] Understanding earth, third edition / Frank Press, Raymond Siever")