Cruz-Aviña, J.R. , Núñez-García, L.G. , Cabrera, R. , Díaz-Larrea, J. and Castañeda-Roldan, E.I. 2021. Microbiological and physicochemical quality of water in four crater lakes in the state of Puebla, Mexico . Nexo Scientific Journal. 34, 06 (Dec. 2021), 1632–1648. DOI:https://doi.org/10.5377/nexo.v34i06.13124.