Minias, P., Kaczmarek, K., Kleszcz, A., Rakowski, M. and Janiszewski, T. 2008. Variability of clutch size in Cormorant (Phalacrocorax carbo sinensis) at the Jeziorsko Reservoir (Central Poland) in 2004. Acta Universitatis Lodziensis. Folia Biologica et Oecologica. 4, (Jan. 2008), 167–176. DOI:https://doi.org/10.18778/1730-2366.04.11.