TY - JOUR AU - Wattanagun, Kanya PY - 2019/12/27 Y2 - 2024/03/28 TI - Front Matter JF - Journal of Letters JA - J of LETT VL - 48 IS - 2 SE - Editorial DO - UR - https://so03.tci-thaijo.org/index.php/jletters/article/view/232285 SP - AB - ER -