BLS Bibliographic Database
Lichen Biology, Cambridge: Cambridge University Press.
, 1996. Handbook of Lichenology, Boca Raton, Florida: CRC Press.
, 1988. Dictionary of the Fungi. Ed. 8, Wallingford: CABI.
, 1995. Chemical and Botanical Guide to Lichen Products, Chapel Hill: University of North Carolina Press.
, 1969. The Biology of Lichens. Ed. 3, London: Arnold.
, 1983. Biology of Lichenized Fungi, New York: Praeger.
, 1984. Ascomycete Systematics. Problems and Perspectives in the Nineties Nato ASI Series, Ser. A: Life Sciences., New York: Plenum Press.
, 1994. Air Pollution and Lichens, London: Athlone Press.
, 1973.