Template:Stirton, 1883a
- Stirton, J. 1883 [1883–1884]. Notes on the Genus Usnea, with descriptions of New Species. (Concluding paper. – Contd. from Vol. VI. p. 297.) The Scottish Naturalist 7(2): 74–79. Mattick Rec.# 30099 – Recent Literature on Lichens BHL