Toivari, L., and O. Lindqvist. “The Marsh Warbler (Acrocephalus Palustris) and Blyth´s Reed Warbler (Acrocephalus Dumetorum) in the District of Lappeenranta, Summer 1960”. Ornis Fennica 38, no. 3–4 (December 31, 1961): 93–95. Accessed September 19, 2024. https://ornisfennica.journal.fi/article/view/132663.