BOOKQUE

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The Lichen Flora of Great Britain and Ireland
O. W. Purvis , B. J. Coppins , D. L. Hawksworth , P. W. James , D. M. Moore
· 1992
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Checklist of Lichens of Great Britain and Ireland
O. W. Purvis , B. J. Coppins , Peter Wilfred James
· 1994
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The effect of mineralization on lichen communities: with special reference to cubriferous substrata
O. W. Purvis
· 1986