1.
Malawal Phattarapong, Wongchai Anupong, and Lin Yi-Chia. Cost Efficiency of Rubber Farmers in the Upper Northern Provinces of Thailand. IJAST [Internet]. 2020May19 [cited 2021Aug.2];29(9s):4411 -48. Available from: https://sersc.org/journals/index.php/IJAST/article/view/16917