1. Estimation of anthropogenic nitrogen and phosphorus inputs to the land surface of the conterminous United States--1992,1997, and 2002 Author/Creator: Sprague, Lori A., author Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2013 Resource Type: Book Access & Availability: Loading
2. Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed Author/Creator: Sprague, Lori A., author Publication/Creation: Richmond, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2000 Resource Type: Book Access & Availability: Loading