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| Author | : | Heilprin, A. |
| Year of publication | : | 1891 |
| Title | : | The geology and paleontology of the Cretaceous deposits of Mexico. |
| Journal | : | Proceedings of the Academy of natural Sciences of Philadelphia |
| Vol/No/Pages/Plates | : | 1890: 445-469, 4 pls. |
| Published in | : | Philadelphia, Pennsylvania |