Não informado. (2022). Mineral & Energy Resources. Colorado School of Mines.
Lua i Stíl Chicago (17ú heag.)Não informado. Mineral & Energy Resources. Golden, Colo: Colorado School of Mines, 2022.
Lua MLA (8ú heag.)Não informado. Mineral & Energy Resources. Colorado School of Mines, 2022.
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