1977. A History of Savanna Vertebrates in the New World, Part I:
North America. _Annual Review of Ecology and Systematics_,
8:355-380, 2 figures.
1978. A History of Savanna Vertebrates in the New World, Part II:
South America and the Great Interchange. _Annual Review
of Ecology and Systematics_, 9:393-426, 1 table.
1985a. Main Pathways of Mammalian Diversification in North America.
_In_ F. G. Stehli and S. D. Webb, editors, _The Great
American Biotic Interchange_, pages 201-217, 1 figure,
1 table. New York: Plenum Publishing.
1985b. Late Cenozoic Mammal Dispersals between the Americas.
_In_ F. G. Stehli and S. D. Webb, editors. _The Great
American Biotic Interchange_, pages 357-386, 3 figures,
1 table. New York: Plenum Publishing.