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Umpai T. THE DEVELOPMENT OF COACHING SUPERVISION MODEL TO IMPROVING EDUCATIONAL QUALITY FOR PRIVATE SCHOOLS OF SURIN PROVINCIAL EDUCATION OFFICE. AJMBU [Internet]. 2022 Jun. 17 [cited 2022 Oct. 4];11(2):ุุ661-675. Available from: https://so01.tci-thaijo.org/index.php/AJMBU/article/view/259031