Field description and sampling of coal beds
By: by James M. Schopf.
Contributors: Geological Survey (U.S.)
Series: Contributions to general geology; U.S. Geological Survey bulletin -- 1111-B
Publisher: U.S. Government Printing Office
Published: 1960
Place of publication: Washington, DC
Language: eng
Number of pages: 70
Notes: Bibliogr.

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