@misc{Kustel_Guido_A,
 author={Kustel, Guido},
 howpublished={online},
 publisher={The Mining and scientific press},
 language={eng},
 type={podręczniki},
 title={A treatise on concentration of all kinds of ores: including the chlorination process. For gold-bearing sulphurets, arseniurets, and gold and silver ores generally},
 keywords={metale, metalurgia, chlorowanie, złoto, siarka, arsen, rudy metali},
}