Coal resource classification system of the U.S. Geological Survey

Circular 891
By: , and 

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Abstract

Publication type Report
Publication Subtype USGS Numbered Series
Title Coal resource classification system of the U.S. Geological Survey
Series title Circular
Series number 891
DOI 10.3133/cir891
Edition -
Year Published 1983
Language ENGLISH
Publisher U.S. Geological Survey,
Description vii, 65 p. :ill., maps ;26 cm.
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