George Gaylord Simpson

Conspectus of Patagonian fossil penguins. American Museum novitates ; no. 2488

Early and middle Tertiary geology of the Gaiman region, Chubut, Argentina. American Museum novitates ; no. 775

Occurrence and relationships of the Río Chico fauna of Patagonia. American Museum novitates ; no. 818

Descriptions of the oldest known South American mammals, from the Río Chico Formation. American Museum novitates ; no. 793

The "Argiles fissilaires," a series of opal-bearing rocks of Patagonia. American Museum novitates ; no.687

Provisional classification of extinct South American hoofed mammals. American Museum novitates ; no. 750

A new notoungulate from the early Tertiary of Patagonia. American Museum novitates ; no. 735

Braincasts of two typotheres and a litoptern. American Museum novitates ; no.629

A new mammalian fauna from the Fort Union of southern Montana. American Museum novitates ; no. 297

Mammalian fauna and correlation of the Paskapoo Formation of Alberta. American Museum novitates ; no. 268