1. The water-quality partnership for national parks : U.S. Geological Survey and National Park Service, 1998-2016 Author/Creator: Nilles, Mark A., author Publication/Creation: [Reston, Virginia] : U.S. Department of the Interior, U.S. Geological Survey, 2016 Resource Type: Book Access & Availability: Loading
2. External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network during 1991 Author/Creator: Nilles, Mark A., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1995 Resource Type: Book Access & Availability: Loading
3. External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network during 1990 Author/Creator: Nilles, Mark A., author Publication/Creation: Denver, Colorado : U.S. Department of the Interior, U.S. Geological Survey, 1993 Resource Type: Book Access & Availability: Loading
4. Variability in wet atmospheric deposition data determined with collocated samplers Author/Creator: Nilles, Mark A., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1992 Resource Type: Book Access & Availability: Loading