23137192
9780888642288
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This collection of leters from the early 1920s to the late 1940s by Dr. Karl A. Clark chronicles the development of the hot water separation process for producing oil from the Athabasca oil sands in Alberta.Sheppard, Mary Clark is the author of 'Oil Sands Scientist : The Letters of Karl A. Clark, 1920-1949', published 1989 under ISBN 9780888642288 and ISBN 0888642288.
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