Oro, D. “The Influence of Commercial Fisheries in Daily Activity of Audouin’s Gulls Larus Audouinii in the Ebro Delta, NE Spain”. Ornis Fennica 72, no. 4 (December 31, 1995): 154–158. Accessed November 22, 2024. https://ornisfennica.journal.fi/article/view/133427.