Bart J, Limpert R, Earnst S, Sladen W, Hines J, Rothe T. Demography of Eastern Population Tundra Swans Cygnus columbianus. Wildfowl [Internet]. 2013 Apr. 16 [cited 2026 Feb. 13];:178-84. Available from: https://tidsskrift.dk/Wildfowl/article/view/154990