phongsajiraangkul napaphat, Rangkoon A. Approaches to Increasing the Efficiency of Personnel Working in the New Normal Era : A Case Study of Maintenance Division, Operation and Maintenance Department Provincial Electricity Authority Area 1 (Northeastern). jomld [internet]. 2021 Oct. 21 [cited 2026 Oct. 3];7(1):301-12. available from: https://so06.tci-thaijo.org/index.php/jomld/article/view/251742