Hydrogeochemistry of the upper part of the Fort Union group in the Gascoyne lignite strip-mining area, North Dakota / 
by Robert L. Houghton ... [et al.]. 
 - Washington :  Denver, CO :  U.S. G.P.O. ;  For sale by the Books and Open-File Reports Section, U.S. Geological Survey,  1987. 
 - iv, 104 p. :  ill., maps ;  29 cm. 
 - U.S. Geological Survey professional paper ;  1340 .
<br/><br/> "Prepared in cooperation with the U.S. Bureau of Land Management, the U.S. Environmental Protection Agency, and the North Dakota Geological Survey. 
<br/><br/>Bibliography: p. 71-74. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Groundwater--North Dakota--Gascoyne Region.<br/>Water quality--North Dakota--Gascoyne Region.<br/>Strip mining--North Dakota--Gascoyne Region.
<br/><br/><label>Dewey Class. No.: </label>551.490978492