@misc{Mansfield_George_Rogers_(1875-1947)_Bulletin,
 author={Mansfield, George Rogers (1875-1947) and Boardman, Leona (1894-1957)},
 copyright={Gdańsk University of Technology Library},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 838. Nitrate deposits of the United States},
 keywords={geology, mineralogy, journals, United States of America},
}