@misc{_Mineral,
 copyright={Biblioteka Politechniki Gdańskiej},
 howpublished={online},
 publisher={United States Geological Survey},
 language={eng},
 type={czasopismo},
 title={Mineral Resources of the United States 1919 Part 1: Introduction, 3, 5-29},
 keywords={Mineralogia, czasopisma},
}