Fettweis,Gunter B. <br/><br/>
World Coal Resources   Methods of Assessment and Results 
/ by Gunter B. Fettweis 
 - new york  elsevier scientific publishing company  1979 
 - 415p. 
<br/><br/><label>ISBN: </label>0444412506 
<br/><br/><label>Dewey Class. No.: </label>553.2  / FET/W