TY  - BOOK
AU  - Kraus,Edward H.
AU  - Slawson,Chester Baker
TI  - Gems And Gem Materials
SN  - 070353611
U1  - 549 22
PY  - 1947///
CY  - New York
PB  - McGraw-Hill Book Co.
KW  - Precious stones
N1  - Includes "Selected bibliography"( p.: 317-319 ), and indexs (p.: 325 - 332)
ER  -