Fajri, Hidayatul, 		, Gunawarman, 		Affi, Jon, AND 		Putra, Rezky.
" Synthesize and Characterization of Hydroxyapatite from Freshwater Snail Shell Sulcospira Sp. Proceed by Combination of Ball Milling and Heat Treatment" <em>Journal of Ocean, Mechanical and Aerospace -science and engineering-</em> [Online], Volume 37 Number 1 (30 November 2016)