@misc{Sajdak_Henryk_(1905-1995)_Polish,
 author={Sajdak, Henryk (1905-1995)},
 address={Katowice},
 howpublished={online},
 publisher={WAG},
 publisher={Druk "Prasa"},
 language={eng},
 title={Polish coal : Węglokoks - Katowice : Poland's sole exporters},
 type={plakat},
 keywords={plakat polski -- 20 w.},
}