U.S. Department of Agriculture1. Alaska forestry research historical images
- Author(s):
- Barnard, Jeffrey C.; Nelson, Kellen N.
2. Historical tree surveys of the Umatilla National Forest
- Author(s):
- Powell, David C.; Hanberry, Brice B.
3. Demographic and leaf attribute data for beargrass (Xerophyllum tenax Melanthiaceae) from Mount Hood National Forest, Oregon
- Author(s):
- Hart-Fredeluces, Georgia M.; Ticktin, Tamara B.
4. Three Sisters, Mt. Jefferson, and Mt. Washington wilderness areas in Oregon: 1991 visitor survey data
- Author(s):
- Cole, David N.; Watson, Alan E.; Cronn, Richard C.
5. Urban tree database
- Author(s):
- McPherson, E. Gregory; van Doorn, Natalie S.; Peper, Paula J.