Não informado. (2001). Special studies. Utah Geological and Mineralogical Survey.
Lua i Stíl Chicago (17ú heag.)Não informado. Special Studies. Salt Lake City, Utah: Utah Geological and Mineralogical Survey, 2001.
Lua MLA (8ú heag.)Não informado. Special Studies. Utah Geological and Mineralogical Survey, 2001.
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