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Sampling of Helen Beryl pegmatite Custer County, S. Dak.

Investigation of the Beecher no. 2 lithium-bearing pegmatite, Custer County, S. Dak.

Published Year

• 1940-1949 (1)
• 1950-1959 (1)

Subject

• Pegmatites--South Dakota--Custer County (2) *
• Lithium ores--South Dakota--Custer County (1)

Author

• Gries, John Paul, (2) *

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