12 pages : illustrations ; 24 cm
Mining company prospectus
Special Collections copy formerly owned by Richard and Naomi Lingenfelter
"We hold the key"
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Special Collections & Archives, UC San Diego, La Jolla, 92093-0175 (https://lib.ucsd.edu/sca)
[Chicago] :, [The Black Sand & Gold Recovery Co.],
Public domain (US)
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