Thomas, LP/ Jackson, JR 1985: Walk Softly Upon the Earth. A Pictorial Field Guide to Missouri Mosses, Liverworts and Lichens. - Missouri Department of Conservation, Jefferson City. 129 pp. [RLL List # 130 / Rec.# 18423] Keywords: POPULAR/ MISSOURI
Abstract: 122 figures, most in color. [Includes 13 common lichens with ecological notes.]