| details |
Middle Pennsylvanian |
|
Illinois |
Darrah,E.L. The microstructure of some Pennsylvanian seeds and megaspores studied by maceration. |
1968 |
| details |
Middle Pennsylvanian |
|
Iowa |
Darrah,E.L. The microstructure of some Pennsylvanian seeds and megaspores studied by maceration. |
1968 |
| details |
Middle Pennsylvanian |
|
Kansas |
Darrah,E.L. The microstructure of some Pennsylvanian seeds and megaspores studied by maceration. |
1968 |
| 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 |