Calonge García, Amelia, M.T. Bercial, J. García Sánchez, and Mª Dolores López Carrillo. 2003. “The Didactic Use of Fossils As a Teaching Tool in Earth Sciences Education”. Pulso. Revista De educación, no. 26 (October): 117-28. https://doi.org/10.58265/pulso.4910.