This was the third year of a four year investigation on the composition, distribution, relative abundance and habitat requirements of endangered, threatened, and rare plant species in the Southeastern Utah National Park Complex.
Heil, Ken and Floyd-Hanna, Lisa
"Composition, Distribution, Relative Abundance and Habitat Requirements of Endangered, Threatened and Rare Species to Southeast Utah Groups,"
University of Wyoming National Park Service Research Center Annual Report: Vol. 15
, Article 5.
Available at: http://repository.uwyo.edu/uwnpsrc_reports/vol15/iss1/5