Não informado. (1984). Minerals & Metallurgical Processing. Society of Mining Engineers of AIME.
Lua i Stíl Chicago (17ú heag.)Não informado. Minerals & Metallurgical Processing. Littleton, Colo: Society of Mining Engineers of AIME, 1984.
Lua MLA (8ú heag.)Não informado. Minerals & Metallurgical Processing. Society of Mining Engineers of AIME, 1984.
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