1989 Vascular Plant Range Extensions of Wrangell-St. Elias National Park Preserve 11 pp.
Cook M. 1989. 1989 Vascular Plant Range Extensions of Wrangell-St. Elias National Park Preserve 11 pp.
Aerial counts, using pilot and observer, involved low-level flights over "sample units" 6 and 7. Sheep observed were classified as ewe, ram, yearling or lamb. Rams were further classified by extent of curl. Dates: July 22 and 26 of 2001.