@misc{Butts_Charles_(1863-1946)_Bulletin,
 author={Butts, Charles (1863-1946) and Moore, Elwood S. (1879-1966)},
 copyright={Biblioteka Politechniki Gdańskiej},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 title={Bulletin 855. Geology and mineral resources of the Bellefonte Quadrangle, Pennsylvania},
 type={czasopismo},
 keywords={geologia, mineralogia, czasopisma, Pensylwania (Stany Zjednoczone ; stan), Stany Zjednoczone},
}