Gilang Maulana, Jumri Dulamin, Nursiah, Sari Mayawati, and Eritha Kristiana Firdara, “Analysis of Income Level of The Nipa Roofing Craftsman (Nypa fruticans Wurmb) in Kumai Subdistrict, Central Kalimantan”, J. Sylva Indonesiana, vol. 6, no. 01, pp. 59-69, Feb. 2023.