4. REFERENCES
Blockeel, T. L. & Long, D. G. (1998). A check-list and census catalogue of British and Irish bryophytes. British Bryological Society.
British Geological Survey (1979). 1:625,000 Geological Map of the United Kingdom. 3rd. Edition (solid).
Meteorological Office (1952). Climatological Atlas of The British Isles. Meteorological Office, London.
Meteorological Office (1975). Climatological Memorandum No.73. Maps of mean and extreme temperature over the United Kingdom, 1941-1970. Bracknell, Berks.
Stace, C.A. (1997). New Flora of the British Isles. 2nd Edition. Cambridge University Press.
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