Halda, J 1997: Príspevek k poznání lichenoflóry Orlickych hor [A contribution to the lichen flora of the Orlické hory Mts. (Eastern Bohemia).]. - Acta Musei Richnoviensis, Sect. Natur.4: 1-24. [RLL List # 183 / Rec.# 22139] Keywords: AIR POLLUTION/ BOHEMIA/ CZECH REPUBLIC