50104537
9780260646279
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Porter, John Bonsall is the author of 'Investigation of the Coals of Canada, with Reference to Their Economic Qualities, Vol. 6 Of 6 : As Conducted at Mcgill University, Montreal, under the Authority of the Dominion Government (Classic Reprint)', published 2017 under ISBN 9780260646279 and ISBN 026064627X.
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