Gardner, A. Dudley. <br/><br/>
Forgotten frontier :  a history of Wyoming coal mining / 
A. Dudley Gardner and Verla R. Flores. 
 - Boulder :  Westview Press,  1989. 
 - xii, 243 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 223-237) and index. 
<br/><br/><label>ISBN: </label>0813310083 (alk. paper) : 0813310075 (pbk. : alk. paper) : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--History.--Wyoming
<br/><br/><label>Dewey Class. No.: </label>978.703  / GAF 1989