Kurniawan, Kurniawan, Anggraeni Yunita, and Christianingrum Christianingrum. 2018. “Increasing Agricultural Production By Utilizing Crab Shell Waste Into Organic Fertilizer On Seliu Island, Belitung Regency”. Jurnal Pengabdian Kepada Masyarakat Universitas Bangka Belitung 4 (2). https://doi.org/10.33019/jpu.v4i2.177.