Israr I, Anatona A. Informal Leadership and Infrastructure Development: The Role of Tungku Tigo Sajarangan in the Batang Agam Hydropower Project (1965–1976). JAS [Internet]. 2026 May 22 [cited 2026 Oct. 18];16(1):1–12. Available from: https://jas.fib.unand.ac.id/index.php/JAS/article/view/159