Downey, Joe S. <br/><br/>
The regional aquifer system underlying the northern Great Plains in parts of Montana, North Dakota, South Dakota, and Wyoming--summary / 
by Joe S. Downey and George A. Dinwiddie 
 - Washington :  United States Government Printing Office,  1988 
 - vii, 64 p. :  ill., maps ;  30 cm. 
 - Regional aquifer-system analysis Geological Survey professional paper ;  1402-A .
<br/><br/> Three folded leaves of illustrations in pocket 
<br/><br/>Bibliography: p. 34-64 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aquifers--Great Plains<br/>Aquifers--Montana<br/>Aquifers--North Dakota<br/>Aquifers--South Dakota<br/>Aquifers--Wyoming
<br/><br/><label>Dewey Class. No.: </label>551.490978