1. Artz, R.S.: 1982, Comparison of methods of air parcel trajectory analysis for defining source-receptor relationships. M.S. Thesis, University of Virginia, Dept. of Environmental Sciences.
2. Artz, R.S., Pielke, R.A. and Galloway, J.: 1985, Atmos. Environ., 19, 47.
3. Barrie, L.A. and Hales, J.M.: 1984, Tellus, 36B, 333.
4. Bigelow, D.S.: 1982, NADP Instruction Manual, Site Operation, January 1982. Program Coordinator's Office, National Atmospheric Deposition Program, Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO.
5. Galloway, J.N., Likens, G.E. and Hawley, M.E.: 1984, Science, 226, 829.