^Creese, Mary R. S. (2010). Ladies in the laboratory III : South African, Australian, New Zealand, and Canadian women in science : nineteenth and early twentieth centuries : a survey of their contributions. Creese, Thomas M. Lanham, Md.: Scarecrow Press. pp. 160–161. ISBN978-0-8108-7289-9. OCLC659564120.
^Pringle, James S. (July–September 1995). "The History of the Exploration of the Vascular Flora of Canada". The Canadian Field-Naturalist. 109 (3): 291–356. Retrieved 10 August 2018. Mention should, however, be made of Edith May Farr (1864-1956) of Philadelphia, who published on the plants of southern British Columbia and Alberta from 1904 to 1906, including a list of the plants of the Selkirk Range and the southern Canadian Rockies based on her collections (Farr 1907). Arnica louiseana Farr, a distinctive species with nodding flower-heads, named for Lake Louise, Alberta, was described in one of these papers (Farr 1906) and remains generally accepted as a species.