pathogenic Armillaria species in a mixed-conifer forest in the Blue Mountains of northeast Oregon”. Canadian Journal of Forest Research. 33 (4): 612—623. doi:10
Gray Owl”. Blue Jay. 22: 10. Nero, R. W.; Copland, H. W. R. (1981). „High mortality of Great Gray Owls in Manitoba-winter 1980-81.”. Blue Jay. 39: 158-165
slanih jezera. Primeri alkalnih jezera su: Alkalno jezero, Okrug Lejk (Oregon); Jezero Boldvin, San Bernardino okrug, Kalifornija; Jezero Ber na granici