@misc{Bastin_Edson_Sunderland_(1878-1953)_Bulletin,
 author={Bastin, Edson Sunderland (1878-1953) and Hill, James Madison (1884-?)},
 copyright={Gdańsk University of Technology Library},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 620-M. Preliminary report on the economic geology of Gilpin Country, Colorado},
 keywords={geology, mineralogy, United States of America, journals},
}