Standards for the classification of public coal lands / by N. Wood Bass, Henry L. Smith, and George H. Horn.
- Physical Description: 1 online resource (iii, 10 pages) : illustrations.
- Publisher: [Washington, D.C.] : U.S. Department of the Interior, [Geological Survey], 
|Bibliography, etc. Note:||
Includes bibliographical references (page 10).
|Source of Description Note:||
Title from title screen (viewed August 4, 2015).
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|Subject:||Coal lands > United States > Classification > Standards.
Coal > United States.
Public lands > United States.