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Feldspar mining and milling :near Keene, New Hampshire
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Published Year
1920-1929 (1)
Subject
Feldspar mines and mining (1)
Feldspar mines and mining--New Hampshire (1)
Feldspar--New Hampshire (1)
Felspar (1)
Ore-dressing (1) *
Author
Ladoo, Raymond B. (1) *
