Não informado. (1971). California Geology. California Division of Mines and Geology.
Lua i Stíl Chicago (17ú heag.)Não informado. California Geology. Sacramento, Calif: California Division of Mines and Geology, 1971.
Lua MLA (8ú heag.)Não informado. California Geology. California Division of Mines and Geology, 1971.
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