@misc{Kowalska_Maria_Studies_1973,
 author={Kowalska, Maria},
 editor={Polska Akademia Nauk. Instytut Zoologiczny},
 copyright={Rights Reserved - Restricted Access},
 address={Warszawa},
 journal={Acta Ornithologica},
 howpublished={online},
 year={1973},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng},
 language={pol},
 language={rus},
 title={Studies on the ossification of the skull in the mallard domestic variety (Anas platyrhynchos var. domestica L.)},
 type={Text},
 keywords={Mallard, bones, growth, skull, ossification, birds, Anas platyrhynchos var. domestica, Anatidae, Aves},
}