Title: Biblio RTF Export
Author: Biblio 7.x

C. J. B.  Hitch and Millbank, J. W., ?Nitrogen Metabolism in Lichens. VII. Nitrogenase Activity and Heterocyst Frequency in Lichens with Blue-Green Phycobionts?, New Phytologist, vol. 75, pp. 239-244, 1975.

J. Walter Thomson and Brehmer, B., American Arctic Lichens I. The Macrolichens. Columbia University Press, 1984.

J. W.  Thomson and Weber, W. A., ?Lichens Collected on the Arctic Excursion of the 9th International Botanical Congress (Montreal) in 1959?, The Bryologist, vol. 95, pp. 392-405, 1992.

T. D. V.  Swinscow and Krog, H., Macrolichens of East Africa. Dorchester: Henry Ling Ltd, The Dorset Press, 1988.

J. W.  Thomson and Ahti, T., ?Lichens Collected on an Alaska Highway Expedition in Alaska and Canada?, The Bryologist, vol. 97, pp. 138-157, 1994.

V.  Alstrup, Hansen, E. Steen, and Daniels, F. J. A., ?Lichenized, lichenicolous and other fungi from North and North-East Greenland?, Folia Cryptogamica Estonica, vol. 37, pp. 1-20, 2000.

O.  Gilbert, Lichens. London: HarperCollins, 2000, p. 288.

I. M.  Brodo, Sharnoff, S. Duran, Laurie-Bourque, S., and Sharnoff, S., Lichens of North America. Yale University Press, 2001.

?Index Fungorum [taxonomy information]?, 2008.