"Reprinted with original pagination from Glasra 8, 1984.
Census catalogue of Irish lichens : a concise conspectus of species of lichens known to occur in Ireland with the distribution of each species by M. R. D. Seaward. Published by the Stationery Office for An Roinn Talmhaíochta, Department of Agriculture in 1984. Publication and catalogue information, links to buy online and reader comments.