Não informado. (2020). Report of the State Mineralogist. California Division of Mines.
Chicago-referens (17:e uppl.)Não informado. Report of the State Mineralogist. San Francisco, Calif: California Division of Mines, 2020.
MLA-referens (8:e uppl.)Não informado. Report of the State Mineralogist. California Division of Mines, 2020.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.