MARBUN, Posma; NASUTION, Zulkifli; HANUM, Hamidah; KARIM, Abubakar. Classification of Inceptisol Soil on Robusta Coffee Plantation in Silima Pungga . International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 30, n. 5, p. 20–27, 2016. Disponível em: https://gssrr.org/JournalOfBasicAndApplied/article/view/6499. Acesso em: 17 sep. 2025.