Coal resources of the americas :  selected papers / 
ed. by Frank E. Kottlowski, Aureal T. Cross, A.A. Meyerhoff 
 - 90 páginas 
 - Special papers / Geological Society of America ;  179 .
<br/><br/><label>ISBN: </label>0813721792 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Carbón--America--Discursos, ensayos, conferencias
<br/><br/><label>LC Class. No.: </label>TN805.A1  / C62