Não informado. (1893). University of California publications in geological sciences. University of California Press.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. University of California Publications in Geological Sciences. Berkeley, Calif: University of California Press, 1893.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. University of California Publications in Geological Sciences. University of California Press, 1893.
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