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Active list of permissible explosives and devices approved previous to June 30, 1943

Published Year

• 1940-1949 (1)

Subject

• Blasting--United States (1)
• Coal mines and mining--Explosives (1) *
• Explosives--United States (1)

Author

• Gaugler, Z. C. (1) *
• Tiffany, J. E. (1)

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