| details |
Tertiary |
|
Hungary |
Kedves,E. et al. Some questions on the bitumen and humic acid content of Hungarian Tertiary Brown Coals. |
1962 |
| details |
Early Eocene |
|
Hungary |
Kedves,M. Contribution to the Lower Eocene flora of Hungary on the basis of palynologic examinations of Coal deposits from Pit 3 of Orozlany and from Pit 1 5/B of Tatabanya. |
1963 |
| details |
Early Eocene |
|
Hungary |
Kedves,E. et al. Investigation of the Bitumen and Humic Acid content of the vegetation types which form the Coaly Roof-Layers of the Bauxite Fields near Iskaszentgyorgy from the Lower Eocene. |
1963 |