@book{80,
  keywords = {Atlas},
  author = {Jermy Anthony C and Arnold Henry R and Farrell Lynne and Perring Franklyn H.},
  title = {Atlas of ferns of the British Isles},
  year = {1978},
  month = {1978},
  publisher = {Botanical Society of the British Isles and British Pteridological Society},
  address = {London},
  url = {http://nora.nerc.ac.uk/7357/1/Ferns.pdf},
  language = {eng},
}