Janet L. Wingate, Ph.D.
Wingate, J.L. and L. Yeatts. 2003, 1995. "Alpine Flower Finder: The Key to Rocky Mountain Wildflowers Found Above Treeline," Johnson Books, A Division of Johnson Publishing Company. Boulder, CO.
Wingate, J.L. 1994. "Illustrated Keys to the Grasses of Colorado," Wingate Consulting, Denver, CO.
Wingate, J.L. 1986. "A Simplified Guide to Common Colorado Grasses," Wingate Consulting. Denver, CO.