1. Albert, Lilia (1990), Curso básico de toxicología ambiental, Mexico, Limusa Noriega.
2. Alloway, B.J. (1990), Heavy Metals in Soils, New York, John Wiley & Sons, Inc.
3. APHA, AWWA, WEF (American Public Health Association, American Water Works Association, Water Environmental
4. Federation) (181992), Standard Methods for the Examination of Water and Wastewater, Washington, American Public Health Association, American Water Works Association, Water Environmental Federation (APHA, AWWA, WEF).
5. Ávila Quijano, Xiomara del Carmen (2006), “Modelo hidrogeoquímico del agua subterránea en el estado de Yucatán, México”, Master thesis in environemental egnineering coordianted by Julia Pacheco Ávila, Merida, Universidad Autónoma de Yucatán, Facultad de Ingeniería.