United States. Bureau of Mines & Hjelmstad, K. E. (1993). Effect of ultralow frequency signaling on blasting array current. U.S. Dept. of the Interior, Bureau of Mines.
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines and Kenneth E. Hjelmstad. Effect of Ultralow Frequency Signaling on Blasting Array Current. Avondale, Md.: U.S. Dept. of the Interior, Bureau of Mines, 1993.
MLA (9th ed.) CitationUnited States. Bureau of Mines and Kenneth E. Hjelmstad. Effect of Ultralow Frequency Signaling on Blasting Array Current. U.S. Dept. of the Interior, Bureau of Mines, 1993.
Warning: These citations may not always be 100% accurate.