Não informado. (1937). Mining Technology. American Institute of Mining and Metallurgical Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Mining Technology. New York: American Institute of Mining and Metallurgical Engineers, 1937.
Lua MLA (8ú heag.)Não informado. Mining Technology. American Institute of Mining and Metallurgical Engineers, 1937.
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