Rāingān kānsamrūat phāwa sētthakit læ sangkhom kh̨̄ong khrūar̄ưan, Ph̨̄o. S̨̄o. 2541 = Report of the 1998 household socio-economic survey (Samnakngān Sathiti h̄æng Chāt, Samnak Nāyok Ratthamontrī, 2000)