@misc{Caspari_Emil_(1877-1935)_The,
 author={Caspari, Emil (1877-1935)},
 howpublished={online},
 publisher={Sampson Low Marston},
 language={eng},
 title={The Working Classes of Upper-Silesia. A historical essay},
 type={broszura polityczna},
 keywords={Górny Śląsk, robotnicy, klasa robotnicza, praca dzieci},
}