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Minor mineral fertilizer materials

Nonmetallic minerals needed for national defense.

Nonmetallic minerals needed for national defense.

Published Year

• 1930-1939 (1)
• 1940-1949 (2)

Subject

• Fertilizers (3) *
• Nonmetallic minerals--United States (2)
• Fertilizer industry--United States (1)
• Mines and mineral resources (1)

Author

• Johnson, Bertrand L. (1)
• Johnson, Bertrand Leroy. (1)
• O'Neill, Leo J. (1)

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