National Audubon Society Field Guide To North Amer
by Society, National Audubon
Revision author John W. Thieret, is Professor Emeritus of Botany at Northern Kentucky University. Authors of the original edition are the late William A. Niering, Professor of Botany at Connecticut College and Director of the Connecticut Arboretum, and Nancy C. Olmstead, Research Associate at the Connecticut Arboretum.
