Noerwidi, Sofwan. “YOUNGER TOBA TEPHRA 74 KYA: IMPACT ON REGIONAL CLIMATE, TERRESTIAL ECOSYSTEM, AND PREHISTORIC HUMAN POPULATION”. AMERTA 30, no. 1 (January 23, 2012): 9–18. Accessed November 24, 2024. https://ejournal.brin.go.id/amerta/article/view/3442.