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University of Oklahoma Press
> Robert E. Hardwicke
Robert E. Hardwicke
title
ISBN-13
(ISBN-10)
year of publication
The Oilman's Barrel
978-O-8O61-4384-2
(O-8O61-4384-3)
2012
E.H.
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R. E.
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R. H.
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Robert E.
·
Robert H.
Robert E. Hardy