Leonard, Arthur Gray,  1865- <br/><br/>
The lignite deposits of North Dakota, 
by Arthur G. Leonard, Earle J. Babcock [and] Leonard P. Dove. 
 - [Grand Forks]  Published for the State Geological Survey [Normanden Publishing Co.]  1925. 
 - [6] 240 p. incl. illus., tables, diagrs. xxi pl. (incl. 7 fold. maps, fold. diagr.)  23 cm. 
 - North Dakota. Geological Survey. Bulletin  no. 4 .
<br/><br/> In cooperation with the School of Mines, College of Engineering, University of North Dakota. 
<br/><br/>Bibliographical references. 
<br/><br/><label>LCCN: </label>gs 25000093  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lignite--North Dakota.
<br/><br/><label>LC Class. No.: </label>TN834.U5  / N9 1925