scholarly journals Water-quality data-collection activities in Colorado and Ohio: Phase III-evaluation of existing data for use in assessing regional water-quality conditions and trends

1992 ◽  
1985 ◽  
Author(s):  
Janet Hren ◽  
Thomas H. Chaney ◽  
J. Michael Norris ◽  
Carolyn J. Oblinger Childress

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