@misc{Bielawski_Ryszard_Badania_[ca, author={Bielawski, Ryszard}, copyright={Creative Commons Attribution BY 3.0 PL license}, howpublished={online}, year={[ca 1955]}, title={Badania terenowe cz. 3}, type={Image}, URL={http://rcin.org.pl/Content/209325/PDF/WA058_188967_Bielawski_Badania-terenowe.pdf}, keywords={Zoological Institute of the Polish Academy of Sciences, field research}, }