@misc{Rosner_Jan_(1906-1991)_Praca_1951,
 author={Rosner, Jan (1906-1991)},
 address={Warszawa},
 howpublished={online},
 year={1951},
 publisher={Polskie Wydawnictwa Gospodarcze},
 title={Praca kolonialna w Afryce},
 keywords={Afryka, praca},
}