Barinaga, Marcia (1995) Origins of Lichen Fungi Explored, Science, 268:1437. A popular account of the work of Andrea Gargas et al. on tracing lichen evolution with the help of DNA Analysis, reported in Science, 268: 1492-97.
Hale, Jr., M.E. (1976) How to Know the Lichens. Dubuque, Iowa: William C. Brown and Co.
Hawksworth, D.L. (1990) The long-term effects of air pollutants on Lichen communities in Europe and North America, in The Earth in Transition. Woodwell, G., ed. Cambridge: Cambridge University Press.
Toemmervik, H., Environmental Surveillance from Satellites A report on the destruction of the arctic ecosystem by pollution from Nickel processing on the Kola peninsula of Russia. A popular report on the work of Toemmervik, H., B. E. Johansen, J. P. Pedersen in the same area. World Wide Web
http://www.itek.norut.no/itek/sat/projects/sur_sat.fm.html
James, P. (1982) Lichens and Air Pollution. London: British Museum; BP Educational Services.
Richardson, D.H.S. (1975) The Vanishing Lichens. Newton Abbot,London and Vancouver: David and Charles
Richardson, D.H.S. (1987) Lichens as Pollution indicators in Ireland. in Biological Indicators of Pollution. Dublin: Royal Irish Academy.
Roth, C. (1984) The Plant Observer's Guidebook. Englewood Cliffs: Prentice-Hall, Inc.
World Resources Institute (1987) A report by the International Institute for Environment and Development and the World Resources Institute. New York: Basic Books.
Gilbert, O.L. (1974) Air Pollution Survey by School Children. Environmental Pollution 6: 175-180.
Leone, M. and B. Petriccione (1991) I Licheni Fanno Scuola. La Nuova Ecologica. March, pp. 47-51.
Ni Lamnha, E., D.H.S. Richardson, P. Dowding, and J.M. Wells. An air quality survey of Cork City and Great Island carried out by school children. Dublin: An Foras Forbartha. (Studies also done of Greater Dublin and Waterford/E. Cork)
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