@article{Bensch_Källander_1997, place={Lund, Sweden}, title={Survival and fledgling production in Black-headed Gulls Larus ridibundus}, volume={7}, url={https://journals.lub.lu.se/os/article/view/22978}, DOI={10.34080/os.v7.22978}, number={1}, journal={Ornis Svecica}, author={Bensch, Steffan and Källander, Hans}, year={1997}, month={Jan.}, pages={37–39} }