Wintering of the whooper swan Cygnus cygnus in the upper reaches of the Oredezh (Volosovo raion, Leningrad oblast)
Journal: Русский орнитологический журнал @ornis
Article in issue: 1722 т.28, 2019.
Free access
Short address: https://sciup.org/140237757
IDS: 140237757
