Seaward, MRD/ Henderson, A 1984: Lichen flora of the West Yorkshire conurbation--supplement III (1981-83). - Naturalist 109: 61-65. [RLL List # 121-81 / Rec.# 16864]
Keywords: BRITISH ISLES/ OWN/ AIR POLLUTION/ WEST YORKSHIRE
Abstract: 1 figure. ["As a consequence of this work, the lichen flora of the West Yorkshire conurbation can be summarized as follows: 322 lichen taxa have been reported from the area within 20 km of the centre of the conurbation, of which 5 are doubtful in the absence of supporting herabrium material, at least 32 are extinct in the area, and 185 have been reported during the present survey (October 1967-December 1983)."]
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