Não informado. (1893). University of California publications in geological sciences. University of California Press.
Chicago-Zitierstil (17. Ausg.)Não informado. University of California Publications in Geological Sciences. Berkeley, Calif: University of California Press, 1893.
MLA-Zitierstil (8. Ausg.)Não informado. University of California Publications in Geological Sciences. University of California Press, 1893.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.