Water resources of the United States

2006 ◽  
Vol 43 (12) ◽  
pp. 43Sup-0331-43Sup-0331
Fact Sheet ◽  
2000 ◽  
Author(s):  
Alan H. Welch ◽  
Sharon A. Watkins ◽  
Dennis R. Helsel ◽  
Michael J. Focazio

1979 ◽  
Vol 4 (3) ◽  
pp. 7-2
Author(s):  
Ellis L. Armstrong ◽  
Jerry D. Priscoli ◽  
William S. Butcher ◽  
Calvin H. Ward

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