Thomson, Robert D. <br/><br/>
The reserve base of U.S. coal by sulfur content (in two parts). 1. The Eastern States / 
by Robert D. Thomson and Harold F. York. 
 - [Washington] :  U.S. Dept. of the Interior, Bureau of Mines,  [1975]. 
 - 537 p., map. 
 - Information circular ;  8680 .
 - United States.  Bureau of Mines.  Information circular ;  8680 .
 - Information circular (United States. Bureau of Mines) ;  8680 .
<br/><br/><label>LCCN: </label>92015007     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal--United States--Eastern States.<br/>Anthracite coal--Sulfur content.--United States<br/>Bituminous coal--Sulfur content.