Hinkle, Stephen R. <br/><br/>
Comparison of chlorofluorocarbon age-dating with particle-tracking results of a regional ground-water flow model of the Portland Basin, Oregon and Washington / 
 Comparison of chlorofluorocarbon age dating with particle-tracking results of a regional ground-water flow model of the Portland Basin, Oregon and Washington 

 - Denver, Colo. :  U.S. Dept. of the Interior, U.S. Geological Survey :  For sale by Branch of Information Services [distributor],  [1997] 
 - v, 47 p. :  ill., maps (some col.) ;  28 cm. 
 - U.S. Geological Survey water-supply paper ; .
<br/><br/> Shipping list no.: 97-0374-P. 
<br/><br/><label>ISBN: </label>0607870435 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Groundwater flow<br/>Groundwater tracers<br/>Chlorofluorocarbons
<br/><br/><label>Dewey Class. No.: </label>551 FOR 1997 A059 Or.