Microfossils from the upper Sylvan Shale (Late Ordovician), Oklahoma, USA. (In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors)
Reference:
Eriksson,M. et al. (2003)
Microfossils from the upper Sylvan Shale (Late Ordovician), Oklahoma, USA. (In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) Serie Correlaciгn Geolгgica. Instituto Superior de Correlaciгn Geolгgica (INSUGEO). Ordovician from the Andes. Proceedings of the International Symposium on the Ordovician System. San Juan - Argentina 2003
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