Tóth, Norbert, Péter Gyüre, János Posta, and Lajos Juhász. 2013. “Population Date of Great Cormorant at the Area of the Hortobágy Fish Farm Co”. Acta Agraria Debreceniensis, no. 51 (February): 51-54. https://doi.org/10.34101/actaagrar/51/2061.