Hansen, Dan E. <br/><br/>
Subsurface correlations of the Cretaceous Greenhorn-Lakota interval in North Dakota. 

 - Grand Forks,  1955. 
 - 46 p.  maps, diagrs. (2 fold. in pocket) tables.  23 cm. 
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>LCCN: </label>gs 55000319  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Cretaceous.<br/>Geology--North Dakota.
<br/><br/><label>LC Class. No.: </label>QE685  / .H22 
<br/><br/><label>Dewey Class. No.: </label>551.77  551.76*