Anna, Lawrence O. <br/><br/>
Geologic framework of the ground-water system in Jurassic and Cretaceous rocks in the northern Great Plains, in parts of Montana, North Dakota, South Dakota, and Wyoming / 
by Lawrence O. Anna 
 - Washington, D.C.  :  United States Government Printing Office, U.S. Geological Survey,  1986 
 - vii, B36, p. :  ill. ;  29 cm. 
 - Regional aquifer-system analysis U.S. Geological Survey professional paper ;  1402-B .
<br/><br/> Accompanied by 18 fold. leaves of plates issued in a portfolio 
<br/><br/>Bibliography: p. B30-B36 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Jurassic<br/>Geology, Stratigraphic--Cretaceous<br/>Geology--Great Plains<br/>Groundwater--Great Plains
<br/><br/><label>Dewey Class. No.: </label>551.7660978