Editorial Authors Professor Chalermsak Pikulsri - Downloads PDF Published 2022-04-30 — Updated on 2022-04-30 Versions 2022-04-30 (4) 2022-04-30 (3) 2022-04-30 (2) 2022-04-30 (1) Issue Vol. 4 No. 1 (2022): January - April 2022 Section Editorial Note