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del Río, C. J. (1992). Middle Miocene bivalves of the Puerto Madryn Formation, Valdés Peninsule, Chubut Province, Argentina (Nuculidae – Pectinidae). Part I. Palaeontographica Abt. A. 225(1-3): 1-58, pls. 1-8.
del Río, C. J. (1992). Middle Miocene bivalves of the Puerto Madryn Formation, Valdés Peninsule, Chubut Province, Argentina (Nuculidae – Pectinidae). Part I. Palaeontographica Abt. A. 225(1-3): 1-58, pls. 1-8.
