Occurrence and distribution of organic chemicals and nutrients and comparison of water-quality data from public drinking-water supplies in the Columbia Aquifer in Delaware, 2000-08 [electronic resource] / by Betzaida Reyes ; prepared in cooperation with the Delaware Department of Natural Resources and Environmental Control and the Delaware Geological Survey.
Imprint
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2010.