Dow, Wallace G. <br/><br/>
The spearfish formation in the Williston Basin of western North Dakota, 
by Wallace G. Dow. 
 - Grand Forks, N.D.,  1967. 
 - ii, 28 p.  illus., maps.  23 cm. 
 - North Dakota. Geological Survey. Bulletin  52 .
 - Bulletin (North Dakota Geological Survey) ;  52. .
<br/><br/> Part of the illustrative matter fold. in pocket. 
<br/><br/>Bibliography: p. 27-28. 
<br/><br/><label>LCCN: </label>gs 67000323 //r84 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--North Dakota.<br/>Geology--Williston Basin.<br/>Geology, Stratigraphic--Permian.<br/>Geology, Stratigraphic--Triassic.
<br/><br/><label>LC Class. No.: </label>QE149  / .D67