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Feldspar mining and milling :near Keene, New Hampshire
Conditions in the feldspar industry
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Published Year
1920-1929 (2)
Subject
Feldspar mines and mining (2) *
Feldspar (1)
Feldspar industry (1)
Feldspar mines and mining--New Hampshire (1)
Feldspar--New Hampshire (1)
Felspar (1)
Mining machinery (1)
Ore-dressing (1)
Author
Ladoo, Raymond B. (2) *
