Casey, George D. <br/><br/>
Hydrogeologic framework of the midwestern basins and arches region in parts of Indiana, Ohio, Michigan, and Illinois / 
by George D. Casey. 
 - Washington, DC :  U.S. Government Printing Office,  [1996] 
 - vi, 46 p. :  ill. (some col.), col. maps ;  29 cm. 
 - Regional aquifer-system analysis--midwestern basins and arches ;  B U.S. Geological Survey professional paper ;  1423 .
<br/><br/> Two folded plates in envelope. 
<br/><br/>Includes bibliographical references (p. 28-31).