@misc{Raczyński_J._[Żubr_[29.05.1973],
 author={Raczyński, J.},
 copyright={Rights Reserved - Restricted Access},
 howpublished={online},
 year={[29.05.1973]},
 title={[Żubr Kalif i mieszańce]},
 keywords={żubroń, bison},
}