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| Barragán, Ricardo and Maurrasse, Florentin J-M. R. Lower Aptian (Lower Cretaceous) ammonites from the basal strata of the La Peña Formation of Nuevo León State, northeast Mexico: biochronostratigraphic implications. Rev. mex. cienc. geol, 2008, vol.25, no.1, p.145-157. ISSN 1026-8774
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