Biostratigraphy of Guadalupian (Mid­dle Permian) am­mo­noids from the Olinalá For­ma­tion, southern Mex­i­co. Carnets Geol. [Internet]. 2026 Feb. 28 [cited 2026 Apr. 19];26:125-50. Available from: https://www.carnetsgeol.net/ojs/CG/article/view/73