TY  - JOUR
AU  - Josep Maria Casas
AU  - Teodoro Palacios
TI  - First biostratigraphical constraints on the pre-Upper Ordovician sequences of the Pyrenees based on organic-walled microfossils
JO  - Comptes Rendus. Géoscience
PY  - 2012
SP  - 50
EP  - 56
VL  - 344
IS  - 1
PB  - Elsevier
DO  - 10.1016/j.crte.2011.12.003
LA  - en
ID  - CRGEOS_2012__344_1_50_0
ER  -