Wagner, R.H., García-Loygorri, A. y Knight, J.A. 1971. Account of the International Field Meeting on the Carboniferous of the Cordillera Cantábrica, 19-26 Sept. 1970. Trabajos de Geología. 3, 3 (dic. 1971), 1–41. DOI:https://doi.org/10.17811/tdg.3.1971.1-41.