@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. 1},
 type={Image},
 URL={http://rcin.org.pl/miiz/Content/208082/PDF/WA058_188965_Bielawski_Badania-terenowe.pdf},
 keywords={field research, Zoological Institute of the Polish Academy of Sciences, Burakowski, Bolesław (1905-2003)},
}