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Valerio, A.L. and Laurito, C.A. 2011. First record of fossil birds (Pelecaniformes: Pelecanidae and a probably Odontopterygiformes: Pelagornithidae) from the Upper Miocene of Costa Rica. Revista geológica de América central. 49, (Jan. 2011), 25–32. DOI:https://doi.org/10.15517/rgac.v0i49.13170.