1. National Water-Quality Assessment Program--Cycle II : regional assessments of aquifers Author/Creator: Lapham, Wayne W. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2005] Resource Type: Book Access & Availability: Loading
2. Natural processes for managing nitrate in ground water discharged to Chesapeake Bay and other surface waters : more than forest buffers Author/Creator: Speiran, Gary K. Publication/Creation: [Reston, Va.] : [U.S. Department of the Interior, U.S. Geological Survey], [1998] Resource Type: Book Access & Availability: Loading