Haapanen, A., I. Ulmanen, and J. Valste. “Observations on the Bird Fauna in Koitilaiskaira (Finnish Lapland)”. Ornis Fennica 43, no. 2 (July 1, 1966): 45–54. Accessed May 14, 2024. https://ornisfennica.journal.fi/article/view/132716.