Ponce Lira, B.; Ortiz Polo, A.; Otazo Sánchez, E. M.; Reguera Ruiz, E.; Acevedo Sandoval, O. A.; Prieto Garcia, F.; Gonzalez Ramírez, C. A. Physical Characterization of an Extensive Volcanic Rock in México: “red tezontle” from Cerro De La Cruz, in Tlahuelilpan, Hidalgo, Mexico. Acta Universitaria 2013, 23 (4), 9-16. https://doi.org/10.15174/au.2013.462.