Berg Åke, Kvarnbäck O. Density and reproductive success of Skylarks Alauda arvensis on organic farms—an experiment with unsown Skylark plots on autumn sown cereals. Ornis Svec [Internet]. 2011 Jan. 1 [cited 2024 Nov. 24];21(1):3–10. Available from: https://journals.lub.lu.se/os/article/view/22613