BLS Bibliographic Database
Lichenes, Stuttgart: Thieme.
, 1974. The Lichens, New York: Academic Press.
, 1974. Mycologist's Handbook. CMI, Kew, Kew: CMI.
, 1974. Air Pollution and Lichens, London: Athlone Press.
, 1973. Phytosociology and Ecology of Cryptogamic Epiphytes. Ed. 2., Assen, Netherlands: Van Gorcum.
, 1970. Chemical and Botanical Guide to Lichen Products, Chapel Hill: University of North Carolina Press.
, 1969. ,0
Predicting the distribution of the air pollution sensitive lichen species Usnea hirta. The Lichenologist, 44, pp.511-522.
,0