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Nonmetallic minerals needed for national defense.
Nonmetallic minerals needed for national defense.
Nonmetallic minerals needed for national defense :2. abrasives
Nonmetallic minerals needed for national defense.
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Published Year
1940-1949 (4) *
Subject
Nonmetallic minerals--United States (4) *
Fertilizers (2)
Abrasives (1)
Fertilizer industry--United States (1)
Nitrates (1)
Author
O'Neill, Leo J. (2)
Johnson, Bertrand L. (1)
Schallis, Alvin H. (1)
