Title: Biblio RTF Export
Author: Biblio 7.x

C. M.  Wetmore, ?The Lichen Family Heppiaceae in North America?, Annals of the Missouri Botanical Garden, vol. 57, pp. 158-209, 1970.

R. B.  Filson, ?The lichen genera Heppia and Peltula in Australia?, Muelleria, vol. 6, pp. 495-517, 1988.

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

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

T. H.  Nash_, III, Ryan, B. D., Gries, C., and Bungartz, F., Lichen Flora of the Greater Sonoran Desert Region, vol. 1. Tempe: Lichens Unlimited, 2001.

M.  Schultz, ?The saxicolous and terricolous, cyanobacterial lichens of Socotra (Yemen, Indian Ocean)?, Nova Hedwigia, vol. 77, pp. 73-97, 2003.