1. APHA (1992). Standard methods for the examination of water and wastewater (p. 326). Washington: American Public Health Association.
2. Athavale, R. N., & Das, R. K. (1999). Beware! Fluorosis is zeroing in on you. Down to Earth, 8, 24–25.
3. Babulal, D., Jitu, T., Surashree, S., Gohain, B., Dutta, R. K., Himangshu, B. D., et al. (2003). Fluoride and other inorganic constituents in groundwater of Guwahati, Assam, India. Current Science, 85(5), 657–661.
4. Bårdsen, A., Bjorvatn, K., Sand, K., & Banks, D. (2000). Seasonal variations of fluoride content in groundwater from wells drilled in bedrock. Norges Geologiske Undersøkelse Bulletin, 435, 53–58.
5. Bhagavan, S. V. B. K., & Raghu, V. (2005). Utility of check dams in dilution of fluoride concentration in groundwater and the resultant analysis of blood serum and urine of villagers, Anantapur district, Andhra Pradesh, India. Environmental Geochemistry and Health, 27, 97–108.