González-Quiroz, O. D.; Aguirre Rubi, J. R.; Saugar, G. de la C.; Orozco Solorzano, A. L.; Álvarez Estrada, G.; Palacios Sánchez, K. M.; Guevara Villavicencio, O. Diagnosis of the Quality of Drinking Water in Rural Communities of Northeastern Sector of the Municipality of León, Nicaragua. Universitas 2007, 1, 7-13.