Kivivuori, O., and H. Velmala. “Rusorintakerttu Sylvia Cantillans Korppoon Jurmossa 1968”. Ornis Fennica 47, no. 2 (July 1, 1970): 89–90. Accessed November 23, 2024. https://ornisfennica.journal.fi/article/view/132796.