1. Precision and bias of selected analytes reported by the National Atmospheric Deposition Program and National Trends Network : 1983 and January 1980 through September 1984 Author/Creator: Schroder, L. J., author Publication/Creation: Lakewood, Colorado : U.S. Geological Survey, 1985 Resource Type: Book Access & Availability: Loading
2. Precision of the measurement of pH and specific conductance at National Atmospheric Deposition Program monitoring sites, October 1981-November 1983 Author/Creator: Schroder, L. J., author Publication/Creation: Lakewood, Colorado : U.S. Geological Survey, 1985 Resource Type: Book Access & Availability: Loading
3. Results of external quality-assurance program for the National Atmospheric Deposition Program and National Trends Network during 1985 Author/Creator: Brooks, Myron H., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1988 Resource Type: Book Access & Availability: Loading
4. External quality-assurance results for the National Atmospheric Deposition Program and the National Trends Network during 1987 Author/Creator: See, Randolph B., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1989 Resource Type: Book Access & Availability: Loading
5. Stability of nitrate-ion concentrations in simulated deposition samples used for quality-assurance activities by the U.S. Geological Survey Author/Creator: Willoughby, Timothy C., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1989 Resource Type: Book Access & Availability: Loading
6. Summary of the National Atmospheric Deposition Program/National Trends Network intersite-comparison program, November 1978-November 1989 Author/Creator: Gordon, J. D., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading