Hake, Mikael, Donald Blomqvist, Elin P Pierce, Tommy Järås, and Olof C Johansson. “Population Size, Migration Routes and Breeding Origin of Purple Sandpipers Calidris Maritima Wintering in Sweden”. Ornis Svecica 8, no. 1–2 (April 1, 1998): 64. Accessed April 24, 2024. https://journals.lub.lu.se/os/article/view/23125.