1. Spatial and monthly trends in speciated fine particle concentration in the United States
2. Hand, J. L.; Copeland, S. A.; Day, D. E.; Dillner, A. M.; Indresand, H.; Malm, W. C.; McDade, C. E.; Moore, C. T.; Pitchford, M. L.; Schichtel, B. A.; Watson, J. G.Spatial and Seasonal Patterns and Temporal Variability of Haze and its Constituents in the United States: Report V, Colorado State, Fort Collins, CO, 2011.http://vista.cira.colostate.edu/improve/Publications/Reports/2011/2011.htm.
3. Quality management and method Validation in EDXRF analysis
4. Estimating measurement uncertainty in an ambient sulfate trend