Simpson, Howard E.  1874-1938. <br/><br/>
Geology and ground-water resources of North Dakota, 
by Howard E. Simpson. With a discussion of the chemical character of the water, by Harry B. Riffenburg. Prepared in cooperation with the State geological survey of North Dakota. A. G. Leonard, director. 
 - Washington,  U.S. Govt. print. off.,  1929. 
 - v, 312 p.  incl. illus., tables. 3 pl. (incl. fold. map)  23 cm. 
 - Geological Survey (U.S.). Water-supply paper  598 .
 - Water-supply paper (Washington, D.C.) ;  598. .
<br/><br/> At head of title: United States Department of the Interior.  Map folded in pocket. 
<br/><br/><label>LCCN: </label>gs 30000001  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--North Dakota.<br/>Water-supply--North Dakota.<br/>Groundwater.
<br/><br/><label>LC Class. No.: </label>TC801  / .U2 no. 598