Bristow, C. R.; Parodiz, J. J. (1982). The stratigraphical paleontology of the Tertiary non-marine sediments of Ecuador. Bulletin of Carnegie Museum of Natural History. 19: 1-53.
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Bristow, C. R.; Parodiz, J. J.
1982
The stratigraphical paleontology of the Tertiary non-marine sediments of Ecuador