Krupa M, Ściborski M, Krupa R, Popis R, Wołoszyn J. Differences in foraging ecology of Wood Sandpiper Tringa glareola and Ruff Philomachus pugnax during spring migration in Sajna River valley (nor thern Poland). Ornis Svec [Internet]. 2009 Apr. 1 [cited 2024 Nov. 25];19(2):90-6. Available from: https://journals.lub.lu.se/os/article/view/22655