Perrilliat, M. del C., Avendaño, J., & Vega, F. J. (2018). Middle Eocene Cypraeoideans from the San Juan Formation, Chiapas, southern Mexico. Revista Mexicana De Ciencias Geológicas, 20(1), 41–51. Retrieved from https://rmcg.unam.mx/index.php/rmcg/article/view/954