Upsorn Boonyang และ Sutatip Siripasrnpipat. (2010) Productions of the hydroxyapatite from calcium based natural sources and their application as drug delivery. Kasetsart University:ม.ป.ท.Upsorn Boonyang และ Sutatip Siripasrnpipat. 2010. Productions of the hydroxyapatite from calcium based natural sources and their application as drug delivery. ม.ป.ท.:Kasetsart University;Upsorn Boonyang และ Sutatip Siripasrnpipat. Productions of the hydroxyapatite from calcium based natural sources and their application as drug delivery. ม.ป.ท.:Kasetsart University, 2010. Print.