scholarly journals A data base of nitrate in ground-water samples from the conterminous United States

1992 ◽  
Author(s):  
K.J. Lanfear
Data Series ◽  
10.3133/ds47 ◽  
1998 ◽  
Author(s):  
Philip A. Baedecker ◽  
Jeffrey N. Grossman ◽  
Kim P. Buttleman

Fact Sheet ◽  
2000 ◽  
Author(s):  
Alan H. Welch ◽  
Sharon A. Watkins ◽  
Dennis R. Helsel ◽  
Michael J. Focazio

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