1. Anonymous. 1968. Club-mosses. Canadian Audubon. Jan.–Feb. pp. 22–23.
2. Blakiston, Captain Thomas. 1863, On the birds of the interior of British North America. The Ibis, vol. 5, no. 18, 39–87.
3. Blankinship, J. W. 1905. Native economic plants of Montana. Mont. Agr. Exp. Sta. Bull.56: 1–38.
4. Browne, L. M. 1968. Chemical constituents of some native medicinal plants. MS thesis, Univ. Alta., Edmonton, pp. 1–91.
5. Budd, A. C, & K. F. Best. 1964. Wild plants of the Canadian prairies. Can. Dept. Agr., Ottawa. Publ. No. 983.