Sergius H Mamay | Bookhype

Mar 1, 2013

Cover of Tinsleya, a New Genus of Seed-Bearing Callipterid Plants from the Permian of North-Central Texas

Tinsleya, a New Genus of Seed-Bearing Callipterid Plants from the Permian of North-Central Texas

Mar 1, 2013

Cover of Upper Paleozoic Floral Zones and Floral Provinces of the United States, with a Glossary of Stratigraphic Terms

Upper Paleozoic Floral Zones and Floral Provinces of the United States, with a Glossary of Stratigraphic Terms