%0 Journal Article
%A Josep Maria Casas
%A Teodoro Palacios
%T First biostratigraphical constraints on the pre-Upper Ordovician sequences of the Pyrenees based on organic-walled microfossils
%J Comptes Rendus. Géoscience
%D 2012
%P 50-56
%V 344
%N 1
%I Elsevier
%R 10.1016/j.crte.2011.12.003
%G en
%F CRGEOS_2012__344_1_50_0