Barker, Rene A. <br/><br/>
Hydrogeologic framework of the Edwards-Trinity aquifer system, west-central Texas / 
by Rene A. Barker and Ann F. Ardis. 
 - Washington :  Denver, CO :  U.S. G.P.O. ;  For sale by U.S. Geological Survey, Branch of Information Services,  1996. 
 - vii, 61 p. :  ill. (some col.), maps (some col.) ;  29 cm. 
 - Regional aquifer-system analysis--Edwards-Trinity aquifer system U.S. Geological Survey professional paper ;  1421-B .
 - Regional aquifer-system analysis--Edwards-Trinity aquifer system ;  B. U.S. Geological survey professional paper ;  1421. .
<br/><br/> Includes eight folded plates in pocket.  Issued in a folder. 
<br/><br/>Includes bibliographical references (p. 57-61). 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Edwards Aquifer (Tex.)<br/>Trinity Aquifer (Tex.)
<br/><br/><label>LC Class. No.: </label>GB1199.3.T4  / B37 1996