SPINDLER, Michael A; HALL, Kent F. Local movements and habitat use of Tundra or Whistling Swans Cygnus columbianus in Kobuk-Selawik Lowlands of northwest Alaska. Wildfowl, [S. l.], p. 17–32, 1991. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154071. Acesso em: 17 dec. 2025.