"Species Details - Crepis atribarba A. Heller ssp. originalis (Babc. & Stebbins) Babc. & Stebbins, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/1-23306. Accessed 12 May. 2024.
There are 6 specimens of this Species.