TY  - BOOK
AU  - Gubelin, E..
TI  - Internal World of Gemstones: Documents from Space and Time / 
SN  - 0-408-00436-3
U1  - H19 
PY  - 1979///
CY  - London WC2B 6AB : 
PB  - Butterworth & Co. Ltd. , 
ER  -