1. National Council for Air and Stream Improvement, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, OR 97850, USA.
2. Oregon Department of Fish and Wildlife, Forestry and Range Sciences Laboratory, 1401 Gekeler Lane, La Grande, OR 97850, USA.
3. Boise Cascade Corporation, 1917 Jackson Street, La Grande, OR 97850, USA.
4. Eastern Oregon Agricultural Research Center, 372 South Tenth, Union, OR 97883, USA.
5. Pacific Northwest Forest and Range Experiment Station, 1401 Gekeler Lane, La Grande, OR 97850, USA.
6. National Council for Air and Stream Improvement, P.O. Box 68, Stevensville, MT 59870, USA.