1. University of North Carolina at Greensboro, 312 Eberhart Building, 321 McIver Street, Greensboro, NC 27402.
2. Weyerhaeuser Company, 505 North Pearl Street, Centralia, WA 98531.
3. National Council for Air and Stream Improvement, Inc., PO Box 340317, Clemson, SC 29634.
4. National Council for Air and Stream Improvement, Inc., PO Box 9681, Mississippi State, MS 39762.