1.
Saragih R, Hutabarat E, Silalahi J, Purba HP, Pasaribu AG. Pastoral Ecology With Umpasa Cultural Approach In Batak Land. Migrat. Lett. [Internet]. 2024Feb.17 [cited 2024Nov.23];21(S6):682-90. Available from: https://migrationletters.com/index.php/ml/article/view/7982