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Official communications

Corporate releases of information by USGS not generally intended to document the details of scientific data or techniques for a scientific audience.
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Historical files from Federal Government mineral exploration-assistance programs, 1950 to 1974

Scanned correspondence documenting the work of these programs, typically including information about the geology and mineralization reported at locations for which development assistance was sought.

Historical Files from Federal Government Mineral Exploration-Assistance Programs, 1950 to 1974

Scanned documents describing applications for Federal assistance in exploring for certain strategic and critical minerals, including where the deposits were examined what minerals were found, and whether mining had occurred.