TY  - JOUR
T1  - Gem stones in ...
CY  - Washington, D.C. :
CN  - I 28.117:
CN  - HD9676.A1
PB  - U.S. Dept. of the Interior, Bureau of Mines,
PP  - Washington, D.C. :
N1  - Title varies slightly.
N1  - Description based on: 1979 prelim.; title from caption.
ID  - 157007
KW  - Precious stones
TI  - Gem stones in ...
ER  -