United States. Bureau of Mines. (1929). Official changes in active list of permissible explosives and blasting devices for May 1929. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Official Changes in Active List of Permissible Explosives and Blasting Devices for May 1929. [Washington]: [publisher not identified], 1929.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Official Changes in Active List of Permissible Explosives and Blasting Devices for May 1929. [publisher not identified], 1929.
Warning: These citations may not always be 100% accurate.