Wetherbee, G.A. and Lehmann, C.M.B., 2008. Mercury Deposition Network Site Operator Training for the System Blank and Blind Audit Programs: U.S. Geological Survey Open-file Report 2008-1252, Ver. 1.0, CDROM.

Latysh, N.E., and Wetherbee, G.A., 2007. External Quality Assurance Programs Managed by the U.S. Geological Survey in Support of the National Atmospheric Deposition Program/Mercury Deposition Network: U.S. Geological Survey Open-file Report 2007-1170.

Wetherbee, G.A., Gay, D.A., Brunette, R.C., and Sweet, C.W., 2006. Estimated Variability of National Atmospheric Deposition Program/Mercury Deposition Network Measurements Using Collocated Samplers: Environmental Monitoring and Assessment, DOI 10.1007/s10661-006-9456-6.

Wetherbee, G.A., Latysh, N.E., and Greene, S.M., 2005. External Quality-Assurance Results for the National Atmospheric Deposition Program/National Trends Network and Mercury Deposition Network, 2004: U.S. Geological Survey Scientific Investigations Report 2006-5067.

Wetherbee, G.A., Greene, S.A., and Gehrke, J.A., Field-Audit Site Operator Training: U.S. Geological Survey Open-File Report 2006-1010, Ver. 1.0, CDROM

Wetherbee, G.A., Latysh, N.E., and Gordon, J.D., 2005. Spatial and temporal variability of the overall error of National Atmospheric Deposition Program measurements determined by the USGS collocated-sampler program, water years 1989-2001: Environmental Pollution 135, 407-418.

Latysh, N.E., and Wetherbee, G.A., 2005. External quality-assurance programs managed by the U.S. Geological Survey in support of the National Atmospheric Deposition Program/National Trends Network: U.S. Geological Survey Open-File Report 2005-1024.

Wetherbe, G.A., Latysh, N.E., and Burke, K.P., 2005. External Quality-Assurance Results for the National Atmospheric Deposition Program/National Trends Network, 2002-2003: U.S. Geological Survey Scientific Investigations Report 2005-5061.

Wetherbee, G.A., Latysh, N.E., and Gordon, J.D., 2004. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network, 2000-2001: U.S. Geological Survey Scientific Investigations Report 2004-5034.

Latysh, N.E. and Gordon, J.D., 2004. Investigation of differences between field and laboratory pH measurements of National Atmospheric Deposition Program/National Trends Network precipitation samples: Water, Air, and Soil Pollution 154, 249-270.

Gordon, J.D., Latysh, N.E., and Lindholm, S.J., 2003. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network, 1997-99: U.S. Geological Survey Water-Resources Investigations Report 03-4027.

Gordon, J.D., 2002. Evaluation of candidate rain gages for upgrading precipitation measurement tools for the National Atmospheric Deposition Program: U.S. Geological Survey Water-Resources Investigations Report 02-4302.

Gordon, J.D., 1999. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network, 1995-96: U.S. Geological Survey Water-Resources Investigations Report 99-4072.

Gordon, J.D., and Hult, L.L., 1999. Results form the Inter-laboratory Comparison Program Operated for the National Atmospheric Deposition Program/National Trends Network, 1983-1998: in Proceedings of the NADP Technical Committee Meeting, October 25-28, 1999, Sacramento, California,  p. 23.