1. Percentile distributions of median nitrite plus nitrate as nitrogen, total nitrogen, and total phosphorus concentrations in Oklahoma streams, 1973-2001 Author/Creator: Haggard, Brian E. (Brian Edward) Publication/Creation: Oklahoma City, OK : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
2. Phosphorus in a ground-water contaminant plume discharging to Ashumet Pond, Cape Cod, Massachusetts, 1999 Publication/Creation: Northborough, MA : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
3. Probability of detecting elevated concentrations of nitrate in ground water in a six-county area of south-central Idaho Author/Creator: Skinner, K. D. (Kenneth D.) Publication/Creation: Denver, CO : U.S. Geological Survey, Information Services [distributor]. Resource Type: Book Access & Availability: Loading