1. Fujita, E.; Watson, J.G.; Chow, J.C.; Robinson, N.F.; Richards L.W.; Kumar N. Northern Front Range Air Quality Study. Volume C: Source Apportionment and Simulation Methods and Evaluation; Prepared for Colorado State University, Fort Collins, CO, and Sonoma Technology, Inc., Santa Rosa, CA, by Desert Research Institute: Reno, NV, 1998.
2. Watson, J.; Fujita, E.; Chow, J.C.; Zielinska, B.; Richards, L.; Neff, W.; Dietrich, D. Northern Front Range Air Quality Study Final Report; Prepared for Colorado State University, Fort Collins, CO, and EPRI, Palo Alto, CA, by Desert Research Institute: Reno, NV, June 1998.
3. Norbeck, J. Standardized Test Kitchen and Screening Tools Evaluation for South Coast Air Quality Management District Proposed Rule 1138; Prepared under Contract No. S-C95073 for the South Coast Air Quality Management District, Del Monte, CA, by CE-CERT: University of California, Riverside, CA, 1997
4. Association of Official Analytical Chemist, Official Actions 960.39 and 950.46.
5. Chow, J.C.; Watson, J.G. Ion Chromatography. In Elemental Analysis of Airborne Particles; Landsberger, S., Creatchman, M., Eds.; Gordon and Breach: Newark, NJ, 1999; pp 97-137.