HASUDUNGAN SIREGAR; YUSNIAR LUBIS; SYAHBUDIN. THE EFFECT OF ISPO IMPLEMENTATION ON PALM OIL FARMERS’ INCOME IN BANDAR PASIR MANDOGE, ASAHAN DISTRICT. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET), [S. l.], v. 2, n. 8, p. 427–436, 2023. DOI: 10.54443/ijset.v2i8.197. Disponível em: https://ijset.org/index.php/ijset/article/view/197. Acesso em: 3 nov. 2025.