Contributions To The Tertiary Paleontology Of The Pacific Coast, Part 1William Healey DallVypredanáPostrážiť
... the Stratigraphic Relations and Paleontology of the "Hell Creek Beds", "Ceratops Beds" and Equivalents: And Their Reference to the Fortunion FormaFrank Hall KnowltonVypredanáPostrážiť
