Kowallis BJ, Swisher III CC, Carranza-Castañeda Óscar, Miller WE, Tingey DG. Fission-track and single-crystal 40Ar/39 Ar laser-fusion ages from volcanic ash layers in fossil-bearing Pliocene sediments in central Mexico. revmexcg [Internet]. 2018 Dec. 2 [cited 2025 Apr. 20];15(2):157-60. Available from: https://rmcg.unam.mx/index.php/rmcg/article/view/1094