Lehmhus, Jörn, and C G Gustavsson. “Hybrids Between Bar-Headed Goose Anser Indicus and Snow Goose Anser Caerulescens”. Ornis Svecica 24, no. 3–4 (October 1, 2014): 147–163. Accessed November 22, 2024. https://journals.lub.lu.se/os/article/view/22556.