Early cenozoic paleontology and stratigraphy of the Bikhorn Basin, Wyoming : commemorating the 100th anniversary of J.L. Wortman's discovery of fossil mammals in the Bikhorn Basin /

Vydáno 1980

A catalogue of Mesozoic and Cenozoic plants of North America /

Autor Knowlton, Frank Hall, 1860-1926
Vydáno 1919