Não informado. (1893). University of California publications in geological sciences. University of California Press.
Chicago-referens (17:e uppl.)Não informado. University of California Publications in Geological Sciences. Berkeley, Calif: University of California Press, 1893.
MLA-referens (8:e uppl.)Não informado. University of California Publications in Geological Sciences. University of California Press, 1893.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.
