Rossotti, A., & Carrasco-Núñez, G. (2018). Stratigraphy of the 8.5 – 9.0 ka B.P. Citlaltépetl pumice fallout sequence. Revista Mexicana De Ciencias Geológicas, 21(3), 353–370. Retrieved from https://rmcg.unam.mx/index.php/rmcg/article/view/881