Gunther, Birgit
Supplement to the tables of gemstone identification - [Germany] 1991 - 45p.
[Text in German & English]
3980029247
GEMSTONES
GEMMOLOGY
549.091(083.86) / G8
Supplement to the tables of gemstone identification - [Germany] 1991 - 45p.
[Text in German & English]
3980029247
GEMSTONES
GEMMOLOGY
549.091(083.86) / G8