TY  - BOOK
AU  - Sinkankas,John
TI  - Prospecting for gemstones and menerals / 
U1  - 553.8 SIN 
PY  - 1970///
CY  - New York : 
PB  - van Nostrand, 
KW  - Gems
KW  - Precious stones
N1  -  "Formerly titled Gemstones and minerals:how and where to find them";  Includes bibliography
ER  -