1. Ajjimangkul, S. (1992) Preventive behavior of arsenic poisoning among mothers with children aged under 5 years, Ronpibool District, Nakhon Sri Thammarat Province. M.Sc Dissertation, Mahidol University.
2. Areekul, S. et al. (1992) Arsenic Contamination in Soil and Water in Ronpibool District, Nakhon Sri Thammarat Province. Report prepared for workshop on ‘Management of Contaminated Water and Environment in Ronpibool District, Nakhon Sri Thammarat Province.’ The National Epidemiology Board of Thailand and Prince Songkhla University.
3. Auan-orn, T. (1988) Natural Characteristics of Arsenic in Thailand and Its Environmental Impact. Report by Faculty of Environment and Natural Resources, Mahidol University.
4. Department of Geology, Ministry of Industry (1988) Report on Distribution and Sources of Arsenic Contamination to Environment in Ronpibool District, Nakhon Sri Thammarat Province.
5. Division of Environmental Health, Department of Health (1989) Report on Summary of Intervention for Chronic Arsenic Poisoning in Ronpibool District, Nakhon Sri Thammarat Province.