Não informado. (2020). 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. Chapter of Report ... of the State Mineralogist Covering Mining in California and the Activities of the State Mining Bureau. San Francisco, Calif: California State Mining Bureau, 2020.
Lua MLA (8ú heag.)Não informado. 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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