Ulfvens, J. “Mercury Content in Eggs of the Great Crested Grebe Podiceps Cristatus and the Horned Grebe Podiceps Auritus in the Archipelago of Korsnäs, Gulf of Bothnia”. Ornis Fennica 63, no. 3 (September 30, 1986): 92–93. Accessed November 13, 2024. https://ornisfennica.journal.fi/article/view/133214.