Fox, Anthony D., Kevin Clausen, Lars Dalby, Thomas Christensen, and Peter Sunde. “Between-Year Variations in sex/Age Ratio Bias in Hunter Wings of Eurasian Wigeon (Anas Penelope) Compared to Field Samples”. Ornis Fennica 93, no. 1 (March 31, 2016): 26–30. Accessed November 24, 2024. https://ornisfennica.journal.fi/article/view/133885.