von Numers, Sebastian, Markus Öst, and Mikael von Numers. “Population Changes in the Declining Turnstone (Arenaria Interpres) and Other Waders in the Northern Baltic Sea Based on past and Current Breeding Observations”. Ornis Fennica 97, no. 4 (December 31, 2020): 149–164. Accessed December 22, 2024. https://ornisfennica.journal.fi/article/view/133973.