Ahmadjion, Vernon, ed. (December 1972). "Notes and News"(PDF). International Lichenological Newsletter. 6 (2): 6. Archived from the original(PDF) on 16 October 2021. Retrieved 5 January 2011.
Ahmadjion, Vernon, ed. (December 1972). "Notes and News"(PDF). International Lichenological Newsletter. 6 (2): 6. Archived from the original(PDF) on 16 October 2021. Retrieved 5 January 2011.