Ichsan Maulana M. Factors Affecting Labor Productivity of Palm Oil Harvesters at PT. Betami, Rantau District, Aceh Tamiang Regency. JARUDA [Internet]. 2022 Jun. 30 [cited 2024 Nov. 27];1(1):1-10. Available from: http://jaruda.org/index.php/go/article/view/1