TY  - BOOK
AU  - Sinkankas, John.
TI  - Van Nostrand's standard catalog of gems
AV  - TS752 .S53 1968
U1  - 553.8 
PY  - 1968///
CY  - New York
PB  - Van Nostrand
KW  - Gems
KW  - Catalogs
KW  - Precious stones
N1  - Includes bibliographical references and index
ER  -