1. Estimation of total nitrogen and total phosphorus in streams of the middle Columbia River Basin (Oregon, Washington, and Idaho) using SPARROW models, with emphasis on the Yakima River Basin, Washington Author/Creator: Johnson, Henry M., author Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2013 Resource Type: Book Access & Availability: Loading
2. Nutrient and suspended solids loads, yields, and trends in the non-tidal part of five major river basins in Virginia, 1985-96 Author/Creator: Johnson, Henry M., author Publication/Creation: Richmond, Virginia : U.S. Geological Survey, 1998 Resource Type: Book Access & Availability: Loading