Gems & gemology :
the quarterly journal of the Gemological Institute of America.
APA Citation
Gemological Institute of America. (1967). Gems & gemology: the quarterly journal of the Gemological Institute of America. [Santa Monica, CA]: the Institute.
MLA Citation
Gemological Institute of America. Gems & Gemology: the Quarterly Journal of the Gemological Institute of America. [Santa Monica, CA]: the Institute, 1967.
Warning: These citations may not always be complete (especially for serials).