United States. Department of Commerce. (1921). Production of explosives in U.S. during calendar year 1921, with notes on mine accidents due to explosives. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of Commerce. Production of Explosives in U.S. During Calendar Year 1921, with Notes on Mine Accidents Due to Explosives. [Washington]: GPO, 1921.
MLA (9th ed.) CitationUnited States. Department of Commerce. Production of Explosives in U.S. During Calendar Year 1921, with Notes on Mine Accidents Due to Explosives. GPO, 1921.
Warning: These citations may not always be 100% accurate.