Humphries, Marc, <br/><br/>
The U.S. coal industry :  historical trends and recent developments / 
 United States coal industry 
Marc Humphries. 
 - [Library of Congress public edition]. 
 - 1 online resource. 
 - Report / Congressional Research Service ;  R44922 .
 - CRS report ;  R44922. .
<br/><br/> The CRS report home page provides access to all versions published since 2018 in accordance with P.L. 115-141.  CRDP Program record. 
<br/><br/>Report includes bibliographical references. 
<br/><br/><label>LCCN: </label>2018253325 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal trade--United States.<br/>Coal--United States.<br/>Coal mines and mining--United States.
<br/><br/><label>GPO Item No.: </label>0807-A-07 (online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>LC 14.23:R 44922/