Stucchi, M.; Urbina, M. (2004). Ramphastosula (Aves, Sulidae): a new genus from the Early Pliocene of the Pisco Formation, Peru. Journal of Vertebrate Paleontology, 24 (4), 974-978
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Stucchi, M.; Urbina, M.
2004
Ramphastosula (Aves, Sulidae): a new genus from the Early Pliocene of the Pisco Formation, Peru.