“Statistical Comparison of Two Metrological Techniques for the Estimation of the Measurement Uncertainty of an Analytical Methodology Implemented in the Laboratory of Natural Waters of the CIRA - UNAN-Managua”. 2020. Revista Científica Estelí, no. 35 (October): 141-53. https://doi.org/10.5377/farem.v0i35.10281.