Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Wada Koji,Biomineralogy and Pearl Culture-2-,Journal of The Gemmological Society of Japan,0385-5090,The Gemmological Society of Japan,1975,2,1,3-10,https://cir.nii.ac.jp/crid/1390282680140011776,https://doi.org/10.14915/gsjapan.2.1_3