| details |
Nd |
|
Nd |
Lachkar,G. New definitions of the megaspore genera Valvisisporites and Pseudovalvisisporites and their principal species. |
1968 |
| details |
Westphalian C |
Westphalian D |
France(Lorraine) |
Alpern,B. et al. Can the Lorraine Coalfield provide a stratotype for the Upper Westphalian? |
1967 |
| details |
Westphalian D |
|
France(Lorraine) |
Alpern,B. et al. Palynologic zonation of the Carboniferous Basin of Lorraine. |
1966 |
| details |
Westphalian D |
|
France |
Lachkar,G. On the systematic position of Triletes saarensis J.Zerndt, 1940. |
1965 |
| details |
Westphalian D |
|
France(Lorraine) |
Lachkar,G. et al. Distribution of megaspores in the Westphalian D and Lower Stephanian of the Coal Basin of Lorraine |
1965 |
| details |
Carboniferous |
|
W.Germany(Saarland) |
Lachkar,G. On the systematic position of Triletes saarensis J.Zerndt, 1940. |
1965 |