Author Affiliations +
Sheryl L. Costello,1 Willis C. Schaupp Jr.2
1USDA Forest Service, Forest Health Management 740 Simms St., Denver, CO 80401 U.S.A. scostello@fs.fed.us
2USDA Forest Service, Forest Health Management 8221 S. Highway 16, Rapid City, SD 80401 U.S.A. bschaupp@fs.fed.us