@misc{Calvert_William_R._Bulletin,
 author={Calvert, William R.},
 copyright={Gdańsk University of Technology Library},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 641-G. Geology of the upper stillwater basin, stillwater and carbon counties Montana},
 keywords={geology, mineralogy, United States of America, journals},
}