Suwilai PremsriratMayuree Thawornpat2023-08-252023-08-25200620062023Thesis (Ph.D. (Linguistics))--Mahidol University, 20069740474969https://repository.li.mahidol.ac.th/handle/20.500.14594/88762xv, 204 leavesapplication/pdfengGong language -- Orthography and spellingHistorical linguisticsLanguage obsolescenceSociolinguistics -- ThailandMahidol University