Densmore, Roseann V, Craig R Ely, Karen S Bollinger, Sheila Kratzer, Mark S Udevitz, Daniel J Febringer, and Thomas C Rothe. 2013. “Nesting Habitat of the Tule Greater White-Fronted Goose Anser Albifrons Elgasi”. Wildfowl, April, 37-51. https://tidsskrift.dk/Wildfowl/article/view/153979.