Boiko D, Kampe-Persson H. Winter distribution of Whooper Swans Cygnus cygnus cygnets bred in Latvia, 2004-2008. Wildfowl [Internet]. 2013 Apr. 16 [cited 2025 Dec. 16];:74-89. Available from: https://tidsskrift.dk/Wildfowl/article/view/153549