@misc{English_Walter_A._Bulletin,
 author={English, Walter A.},
 copyright={Biblioteka Politechniki Gdańskiej},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={czasopismo},
 title={Bulletin 721. Geology and petroleum resources of Northwestern Kern County, California},
 keywords={geologia, mineralogia, czasopisma, Kalifornia (Stany Zjednoczone ; stan)},
}