@misc{Lupton_Charles_Thomas_(1878-1935)_Bulletin,
 author={Lupton, Charles Thomas (1878-1935) and Condit, Daniel Dale (1886-?)},
 copyright={Gdańsk University of Technology Library},
 howpublished={online},
 publisher={Government Printing Office.},
 language={eng},
 type={journal},
 title={Bulletin 640-H. Gypsum in the southern part of the Bighorn Mountains Wyoming},
 keywords={United States of America, geology, mineralogy, journals},
}