TY  - HOUR
T1  - Gems & gemology.
DA  - c1967-
CY  - Los Angeles, Calif. :
CN  - TS720
CN  - TS720
PB  - Gemological Institute of America,
PP  - Los Angeles, Calif. :
PY  - c1967-
N1  - Title from cover.
ID  - 202255
KW  - Precious stones
SN  - 0016-626X
TI  - Gems & gemology.
ER  -