@misc{Yerka_Jacek_(1952-_)_1,
 author={Yerka, Jacek (1952- )},
 address={Toruń},
 howpublished={online},
 publisher={ZGT},
 language={pol},
 type={plakat},
 title={1 maja : Toruń 78},
 title={Plakaty},
}