TY  - BOOK
AU  - Keller,Peter C.
AU  - Pelt,Harold Van
AU  - Pelt,Erica Van
AU  - Gubelin,Edward
TI  - Gemstones and their origins
SN  - 0442319452
AV  - QE392 K45
U1  - 553.8 20
PY  - 1990///
CY  - New York
PB  - Van Nostrand Reinhold
KW  - Piedras preciosas
N1  - Includes bibliographies and index
ER  -