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Active list of permissible explosives and blasting devices approved before Jan. 1, 1965

Published Year

• 1960-1969 (1)

Subject

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

Author

• Hanna, N. E. (1) *
• Richardson, P. A. (1)

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