BLS Bibliographic Database
Progress and Problems in Lichenology in the eighties. Bibliotheca lichenologica.,
, 1987. Lichens Life Series., London: Natural History Museum.
, 2000. The Vanishing Lichens, Newton Abbot: David & Charles.
, 1975. Pollution Monitoring with Lichens, Slough: Richmond Publishing.
, 1992. Lichen Ecology, London: Academic Press.
, 1977. Predicting the distribution of the air pollution sensitive lichen species Usnea hirta. The Lichenologist, 44, pp.511-522.
,0 Ecological indicator values of lichens - enlarged and updated species list. Herzogia, 23, pp.229-248. Available at: http://www.blam-hp.eu/.
, 2010.