@misc{Bielawski_Ryszard_IV_1953,
 author={Bielawski, Ryszard},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 howpublished={online},
 year={1953},
 title={IV Zjazd PTZool w Warszawie cz.3},
 type={Image},
 URL={http://rcin.org.pl/Content/207029/PDF/WA058_174639_Bielawski_PTZool-Warszawa-1953.pdf},
 keywords={Polish Zoological Society, Riedel (z d.Elkner), Wanda (1931-2015), Świrski, Zbigniew (1929- ), PTZool},
}