| original |
Westphalian D |
|
France |
Alpern,B. Contribution to the palynological and petrographic study of French Coals. |
1959 |
| details |
Late Pennsylvanian |
|
Illinois |
Peppers,R.A. Palynology of the McLeansboro Group of Illinois and equivalent strata of Western Kentucky |
1961 |
| details |
Late Pennsylvanian |
|
Kentucky |
Peppers,R.A. Palynology of the McLeansboro Group of Illinois and equivalent strata of Western Kentucky |
1961 |
| details |
Westphalian D |
|
France(Lorraine) |
Venkatachala,B.S. et al. Sporological study of the coals from Falkenberg (Faulquemont) Colliery, Lothringen (Lorrain) France. |
1964 |
| details |
Pottsville |
|
Indiana |
Gray,L.R. et al. Morphological variation of Ahrensisporites symetricus Alpern. |
1967 |