@misc{Żuk_Włodzimierz_(1916-1981)._Isotopic,
 author={Żuk, Włodzimierz (1916-1981). and Chomicz, Edward. and Piasecka, Maria (chemia).},
 howpublished={online},
 publisher={UMCS},
 language={eng},
 title={Isotopic composition of Sulphur from ZnS, FeS2 and PbS ores /},
 type={artykuł},
 keywords={Izotopy -- analiza., Siarka -- izotopy.},
}