TY - JOUR AU - Wattanagun, Kanya PY - 2021/06/28 Y2 - 2024/03/29 TI - Front Matter JF - Journal of Letters JA - J of LETT VL - 50 IS - 1 SE - Editorial DO - UR - https://so03.tci-thaijo.org/index.php/jletters/article/view/257503 SP - AB - ER -