Magaña Palma, N. and Carlson Morales, C. 2023. Safety protocol for in and out control for elementary schools students. Boletín Científico de la Escuela Superior Atotonilco de Tula. 10, 20 (Jul. 2023), 32–36. DOI:https://doi.org/10.29057/esat.v10i20.9056.