Explore Books on
pennsylvanian geologic period
1-3 of 3 Books
View Footprints in Stone By Ronald J. Buta .,David C. Kopaska-Merkel 
Footprints in Stone
By Ronald J. Buta .,David C. Kopaska-Merkel
View The fossil flora of the Drywood Formation of southwestern Missouri By Philip W. Basson 
The fossil flora of the Drywood Formation of southwestern Missouri
By Philip W. Basson
View Subsurface geology and coal resources of the Pennsylvanian system in Wabash County, Illinois By Gilbert H. Cady 
Subsurface geology and coal resources of the Pennsylvanian system in Wabash County, Illinois
By Gilbert H. Cady