(EN) Lower Klamath Refuge Map (JPG), su fws.gov, U.S. Fish and Wildlife Sevice. URL consultato l'8 giugno 2010.
usgs.gov
pubs.usgs.gov
(EN) E.C. La Rue, Klamath River and its utilization: Report to the Office of the State Engineer, Salem, Oregon, 1922, p. 204. Citato da M. W. Gannett et al., 2010. (EN) M.W. Gannett, et al., Introduzione, in Ground-Water Hydrology of the Upper Klamath Basin, Oregon and California, Scientific Investigations Report 2007–5050, Klamath Basin National Wildlife Refuges Complex, aprile 2010. URL consultato l'8 giugno 2010.