Effect of Calcination Temperature Variation on Hydroxyapatite of Cuttlefish Shell Waste (Sepia Sp.). Gravitasi [Internet]. 2023 Aug. 31 [cited 2026 Oct. 20];22(1):31-4. Available from: https://bestjournal.untad.ac.id/index.php/GravitasiFisika/article/view/16312