Kittilertpaisan J, Kittilertpaisan K, Khatiwat P. Technical Efficiency of Rubber Farmers’ in Changwat Sakon Nakhon: Stochastic Frontier Analysis. IJEFI [Internet]. 2016 Oct. 4 [cited 2024 Apr. 19];6(6S):138-41. Available from: https://econjournals.com/index.php/ijefi/article/view/3144