@misc{Knopf_Adolph_(1882-1966)_Bulletin,
 author={Knopf, Adolph (1882-1966)},
 copyright={Gdańsk University of Technology Library},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 640-L. Tungsten deposits of northwestern Inyo County, California},
 keywords={geology, mineralogy, United States of America, journals},
}