Author: Culberson, W.L., 1968.:
Title: The lichen genera Cetrelia and Platismatia (Parmeliaceae).
Description: [Contr. U.S. Narl. Herb., 34(7).] Washington: Smithsonian Instution Press. 8vo, 23.3cm. Pp. iv,449-558, 79 photos on 25 pls., 31 figs. and distrib. maps, refs., index. Orig. wrs.

Keywords: