The flora of the Fox Hills sandstone /

Autor Knowlton, Frank Hall, 1860-1926
Vydáno 1916

Observations on fossil plants from the Devonian of eastern North America. III., Gilboaphyton goldringiae, gen. et sp. nov., from the Hamilton of eastern New York /

Autor Arnold, Chester A. 1901-1977
Vydáno 1937

North American Mesozoic Charophyta /

Autor Peck, Raymond E.
Vydáno 1957

The foraminiferal genus Orbitolina in North Ameriaca /

Autor Douglass, Raymond C. 1923-2005
Vydáno 1960