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Allen, P. A.; Cabrera, L.; Colombo, F.; Matter, Albert (1983). Variations in fluvial style on the Eocene-Oligocene alluvial fan of the Scala Dei Group, SE Ebro Basin, Spain. Journal of the Geological Society, 140(1), pp. 133-146. Geological Society of London 10.1144/gsjgs.140.1.0133
