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• Active list of permissible explosives and blasting devices approved prior to June 30, 1938
• Active list of permissible explosives and blasting devices approved prior to June 30, 1939 / U.S. Dept. of the Interior, Bureau of Mines.
• Active list of permissible explosives and devices approved previous to June 30, 1943
• Active list of permissible explosives and blasting devices approved before February 28, 1961