*Generic Reference Type Author Year Title Secondary Title Volume Pages Publisher Secondary Author Notes Keywords Abstract Accession Number Journal Article Fryday, A. 1996 A provisional re-assessment of the non-yellow species of Rhizocarpon occuring in the British Isles British Lichen Society Bulletin 78 29-40 1 1 https://britishlichensociety.org.uk/sites/default/files/bulletins/BLS%20Bulletin%2078%20Summer%201996.pdf British Isles, Rhizocarpon 35240