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Active list of permissible explosives and blasting devices approved prior to June 30, 1941

Active list of permissible explosives and blasting devices approved prior to June 30, 1942

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

Active list of permissible explosives and blasting devices approved previous to December 31, 1945

Active list of permissible explosives and blasting devices approved previous to December 31, 1945 :supplement

Published Year

• 1940-1949 (5)

Subject

• Blasting--Equipment and supplies--Law and legislation--United States (2)
• Explosives (2)
• Explosives--Law and legislation--United States (2)
• Mining engineering--Equipment supplies--Law and legislation--United States (2)
• Blasting--United States (1)
• Coal mines and mining--Explosives (1)
• Explosives--United States (1)

Author

• Gaugler, Z. C. (5) *
• Tiffany, J. E. (5)

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