Marines Castillo, E.E., Heredia Carrillo, E.I. and Garduño GarcÍa, C. 2023. Construction of a Solar Still Prototype to Reduce Extreme Water Hardness in the Mayan Community Ejido 20 de Noviembre. European Journal of Engineering and Technology Research. 8, 6 (Nov. 2023), 18–23. DOI:https://doi.org/10.24018/ejeng.2023.8.6.3115.