11. New historical atlas of religion in America Publication/Creation: New York : Oxford University Press, [2001] Resource Type: Map Access & Availability: Loading
12. Nitrate in ground water : using a model to simulate the probability of nitrate contamination of shallow ground water in the conterminous United States Author/Creator: Hitt, Kerie J. Publication/Creation: Reston, Va. : USGS National Water-Quality Assessment Program, 2005 Resource Type: Map Access & Availability: Loading