@misc{Mansfield_George_Rogers_(1875-1947)_Bulletin,
 author={Mansfield, George Rogers (1875-1947)},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 620-O. A reconnaissance for phosphate in the Salt River Range, Wyoming},
 keywords={United States of America, geology, mineralogy, journals},
}