@misc{Mansfield_George_Rogers_(1875-1947)_Bulletin,
 author={Mansfield, George Rogers (1875-1947)},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={czasopismo},
 title={Bulletin 716-F. Coal in Eastern Idaho},
 keywords={geologia, mineralogia, czasopisma, Idaho (Stany Zjednoczone ; stan)},
}