Negative of a photograph of an unidentified miner working in a fluorspar mine near Delta, Utah
Negative of photographs of unidentified miners working in the Placer Mine, Ely, Nevada
Color transparency photograph of two unidentified men in a fluorspar mine near Delta, Utah
Negative of photographs of unidentified miners working in the Placer Mine, Ely, Nevada
Negative of a photograph of an unidentified miner working in a fluorspar mine near Delta, Utah
Negative of a photograph of an unidentified miner working in a fluorspar mine near Delta, Utah
Negative of a photograph of an unidentified man, probably a miner, in a fluorspar mine near Delta, U...
Color transparency photograph of an unidentified man in a fluorspar mine near Delta, Utah
Color transparency photograph of an unidentified man in a fluorspar mine near Delta, Utah
Color transparency photograph of unidentified people in a fluorspar mine near Delta, Utah
Negative of photographs of an unidentified miner working in the Placer Mine, Ely, Nevada
Negative of photographs of an unidentified miner working at the Placer Mine, Ely, Nevada
Color transparency photograph showing a view of a fluorspar mine near Delta, Utah
Color transparency photograph showing a view of a fluorspar mine near Delta, Utah
Negative of photographs of unidentified miners working in the Placer Mine, Ely, Nevada
Color transparency photograph of an unidentified woman in a fluorspar mine, holding samples of the m...
Negative of photographs of unidentified miners working in the Placer Mine, Ely, Nevada
Color transparency photograph of two unidentified men in a fluorspar mine near Delta, Utah
Negative of photographs of unidentified miners working in the Placer Mine, Ely, Nevada
Negative of a photograph of an unidentified miner working in a fluorspar mine near Delta, Utah
Negative of a photograph of an unidentified miner working in a fluorspar mine near Delta, Utah
Negative of a photograph of an unidentified man, probably a miner, in a fluorspar mine near Delta, U...
Color transparency photograph of an unidentified man in a fluorspar mine near Delta, Utah
Color transparency photograph of an unidentified man in a fluorspar mine near Delta, Utah
Color transparency photograph of unidentified people in a fluorspar mine near Delta, Utah
Negative of photographs of an unidentified miner working in the Placer Mine, Ely, Nevada
Negative of photographs of an unidentified miner working at the Placer Mine, Ely, Nevada
Color transparency photograph showing a view of a fluorspar mine near Delta, Utah
Color transparency photograph showing a view of a fluorspar mine near Delta, Utah
Negative of photographs of unidentified miners working in the Placer Mine, Ely, Nevada
Color transparency photograph of an unidentified woman in a fluorspar mine, holding samples of the m...
Negative of photographs of unidentified miners working in the Placer Mine, Ely, Nevada
Color transparency photograph of two unidentified men in a fluorspar mine near Delta, Utah
Negative of photographs of unidentified miners working in the Placer Mine, Ely, Nevada