Khanongnuch, Thanida, and Alongkorn Muangwai. 2021. “EFFICIENCY ENHANCEMENT AND REDUCING LOGISTICS COST WITH MATHEMATICAL MODEL OF AUTO PART INDUSTRY A CASE STUDY: P.E TECHNIC CO., LTD. IN PHITSANULOK PROVINCE”. Life Sciences and Environment Journal 22 (2):205-15. https://doi.org/10.14456/lsej.2021.8.