| details |
Middle Pennsylvanian |
|
Indiana |
Eggert,D.A. et al. Studies of Paleozoic ferns |
1966 |
| details |
Middle Pennsylvanian |
|
Iowa |
Eggert,D.A. et al. Studies of Paleozoic ferns |
1966 |
| details |
Middle Pennsylvanian |
|
Kansas |
Eggert,D.A. et al. Studies of Paleozoic ferns |
1966 |
| details |
Middle Pennsylvanian |
|
Illinois |
Eggert,D.A. et al. Studies of Paleozoic ferns |
1966 |
| details |
Middle Pennsylvanian |
|
USA |
Taylor,T.E. et al. Studies of spores from Carboniferous fructifications. 1. Introduction and preliminary survey utilizing the Scanning Electron Microscope. |
1969 |
| details |
Middle Pennsylvanian |
|
USA |
Taylor,T.N. et al. Preliminary study of spores from Carboniferous fructifications utilizing the Scanning Electron Microscope. |
1969 |
| details |
Nd |
|
Nd |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |