DINFA, P. . STUDY OF THE DEVELOPMENT OF WASTEWATER TREATMENT SYSTEMS AND THE YUAN ISLAND AS A TOURIST ATTRACTION OF NAKHON SAWAN MUNICIPALITY’S YUAN CHUAN RAK CANAL FOR DEVELOPING A GEOGRAPHICAL DATABASE AND PROGRAMED INSTRUCTION. Journal of MCU Nakhondhat, Nakhon Si Thammarat, Thailand, v. 10, n. 9, p. 158–170, 2023. Disponível em: https://so03.tci-thaijo.org/index.php/JMND/article/view/270867. Acesso em: 19 may. 2024.