Horwood,A R 1912: A hand-list of the lichens of Great Britain, Ireland, and the Channel islands. - \Comp. Lich. Exch, Club Brit. Isles, Dulau & Co, Soho Square, London W1912: 45 p. [Mattick Rec.# 27562] Keywords: GREAT BRITAIN
Abstract: 142 genera, 1259 species