Helgesen, John O. <br/><br/>
Hydrology of the Great Plains aquifer system in Nebraska, Colorado, Kansas, and adjacent areas 
by John O. Helgesen, Robert B. Leonard, and Ronald J. Wolf. 
 - Washington  U.S. G.P.O.  1993. 
 - viii, 80 p.  ill.  29 cm. b+ s 10 fold. maps in separate portfolio. 
 - Regional aquifer-system analysis--Central Midwest U.S. Geological Survey professional paper  1414-E .
<br/><br/>Includes bibliographical references (p. 77-80). 
<br/><br/><label>LCCN: </label>93003584  
<br/><br/><label>Subjects--Topical Terms: </label><br/>n-uss
<br/><br/><label>Subjects--Geographic Terms: </label><br/>High Plains Aquifer.
<br/><br/><label>LC Class. No.: </label>GB1199.3.H53  / H45 1993 
<br/><br/><label>Dewey Class. No.: </label>551.49/0978 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.16:1414-E