The Journal of Gemmology
- 1 January 1968
- journal article
- Published by Gem-A in The Journal of Gemmology
- Vol. 11 (3) , 92-93
- https://doi.org/10.15506/jog.1968.11.3.92
Abstract
Gem-A - the world's longest established provider of gem education.This publication has 0 references indexed in Scilit: