Sebayang L. ASSESSMENT OF COMMODITIES AREA GAMBIER (Uncaria gambir Roxb.) IN PAKPAK BHARAT SCALE 1 : 50.000. Petrop [Internet]. 2015Aug.1 [cited 2024May19];2(2):102-109`. Available from: https://talenta.usu.ac.id/jpt/article/view/2890