Van Sant, Joel N. <br/><br/>
Methods and costs of mining lignite in North Dakota, 
by J. N. Van Sant and R. C. Ellman. 
 - [Washington],  U.S. Dept. of the Interior, Bureau of Mines,  1959. 
 - iv, 82 p.  illus., maps, tables.  27 cm. 
 - United States. Bureau of Mines. Information circular  7891 .
 - Information circular (United States. Bureau of Mines) ;  7891. .
<br/><br/><label>LCCN: </label>int59000040  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lignite--North Dakota.<br/>Strip mining.
<br/><br/><label>LC Class. No.: </label>TN295  / .U4 no. 7891