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ኢ-መጽሐፍት
Water-level changes in the High Plains Aquifer: predevelopment to 2002, 1980 to 2002, and 2001 to 2002
ነፃ
Water-level changes in the High Plains aquifer, predevelopment to 2001, 1999 to 2000, and 2000 to 2001
ነፃ
Hydrogeology in the Vicinity of the Nebraska Management Systems Evaluation Area Site, Central Nebraska
ነፃ
Hydrogeology and Subsurface Nitrate in the Upper Big Blue Natural Resources District, Central Nebraska, July 1995 Through September 1997
ነፃ