[1]
Kampe-Persson, H. et al. 2013. Erratum: Distribution and numbers of moulting non-breeding Whooper Swans Cygnus cygnus in the Baltic States and South Sweden. Ornis Svecica. 23, 1 (Jan. 2013), 61–62. DOI:https://doi.org/10.34080/os.v23.23114.