Reference:Mickel1979a
Verbatim text: Mickel, J. T. 1979b. The fern genus Cheilanthes in the continental United States. Phytologia 41: 431--437. Pichi-
Author: Mickel, J.T.
Year: 1979b
Title: The fern genus Cheilanthes in the continental United States
Journal: Phytologia
Volume: 41
Pages: 431–437