The foraminiferal genus Orbitolina in North America | by Raymond C. Douglass
20050525d1960 0grey5005 ba
- A study of the genus Orbitolina, its type species, morphology, and stratigraphic and geographic distribution in North America = Washington
- A study of the genus Orbitolina, its type species, morphology, and stratigraphic and geographic distribution in North America = Washington