Reilly, Thomas E <br/><br/>
Factors affecting areas contributing recharge to wells in shallow aquifers / 
by Thomas E. Reilly and David W. Pollock 
 - Washington :  U.S. Government Printing Office,  1993 
 - 21 p. :  ill. ;  27 cm. 
 - U.S. Geological Survey water-supply paper ;  2412 .