Não informado. (2020). Monthly Chapter of Report ... of the State Mineralogist Covering Mining in California and the Activities of the State Mining Bureau. California State Mining Bureau.
Lua i Stíl Chicago (17ú heag.)Não informado. Monthly Chapter of Report ... of the State Mineralogist Covering Mining in California and the Activities of the State Mining Bureau. Sacramento, Calif: California State Mining Bureau, 2020.
Lua MLA (8ú heag.)Não informado. Monthly Chapter of Report ... of the State Mineralogist Covering Mining in California and the Activities of the State Mining Bureau. California State Mining Bureau, 2020.
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