@misc{Day_David_Talbot_(1859-1925)_Bulletin,
 author={Day, David Talbot (1859-1925)},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 581-A. Oil shale of Northwestern Colorado and Northeastern Utah},
 keywords={geology, mineralogy, United States of America, journals},
}