TY  - BOOK
AU  - Kunz, George Frederick
AU  - Olsen, Edward,
TI  - Gems and precious stones of North America: a popular description of their ocurrence, value, history, archaeology and of the collections in which they exist, also a chapter on pearls and on remarkable foreign gems owned in the United States 
SN  - 0486218554
AV  - TS752 K84 1968
PY  - 1968///
CY  - New York
PB  - Dover
KW  - Gemas
KW  - Perlas
KW  - Piedras preciosas
ER  -