Hawksworth, DL/ Coppins, BJ/ Rose, F 1974: Changes in the British lichen flora. - In: D. L. Hawksworth (ed.): The Changing Flora and Fauna of Britain. . Academic Press, London and New York pp. 47-78. [RLL List # 90 / Rec.# 7877] Keywords: FLORA / CHANGES / POLLUTION / BRITISH ISLES