Não informado. (1893). University of California publications in geological sciences. University of California Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. University of California Publications in Geological Sciences. Berkeley, Calif: University of California Press, 1893.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. University of California Publications in Geological Sciences. University of California Press, 1893.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.