@misc{Zieliński_Piotr_Egg_1998,
 author={Zieliński, Piotr and Bańbura, Jerzy},
 volume={33},
 editor={Polska Akademia Nauk. Muzeum i Instytut Zoologii},
 number={3-4},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1998},
 publisher={Muzeum i Instytut Zoologii PAN},
 language={eng},
 language={pol},
 type={Text},
 title={Egg size variation in the barn swallow Hirundo rustica},
 URL={http://rcin.org.pl/miiz/Content/43599/PDF/WA058_60653_P257-T33_Acta-Ornith-Nr-2-12.pdf},
 keywords={Barn Swallow, egg size, measurement, Poland, Middle, hatching success, swallows, birds, Hirundo rustica, Hirundinidae, Aves, 1978-81},
}