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Wagner, R.H. y Martínez García, E. 1982. Description o fan early Permian flora from Asturias and comments on similar occurrences in the Iberian Peninsula. Trabajos de Geología. 12, 12 (dic. 1982), 273–287. DOI:https://doi.org/10.17811/tdg.12.1982.273-287.