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Active list of permissible explosives and blasting devices approved prior to June 30, 1940

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

Published Year

• 1940-1949 (3) *

Subject

• Blasting--Equipment and supplies--Law and legislation--United States (3)
• Explosives--Law and legislation--United States (3) *
• Mining engineering--Equipment supplies--Law and legislation--United States (3)

Author

• Gaugler, Z. C. (2)
• Tiffany, J. E. (2)

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