Aronsson Åke. The change in nunbers of Nightjars Caprimulgus europaeus during twentyone years at Ale and Vättle fjäll near Gothenburg. Ornis Svec [Internet]. 1995 Oct. 1 [cited 2024 May 4];5(3–4):161-4. Available from: https://journals.lub.lu.se/os/article/view/23004