@misc{Pack_Robert_Wallace_(1885-?)_Bulletin,
 author={Pack, Robert Wallace (1885-?) and English, Walter A.},
 copyright={Biblioteka Politechniki Gdańskiej},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={czasopismo},
 title={Bulletin 581-D. Geology and oil prospects in Waltham, Priest, Bitterwater, and Peachtree Valleys, California with notes on coal},
 keywords={geologia, mineralogia, czasopisma, Stany Zjednoczone, California},
}