TY  - GEN
AU  - Dharmaratne, P. G. R
TI  - Gem industry of Sri Lanka
SN  - 9559370010
U1  - 620.198 
PY  - 2005///
CY  - Sri Lanka
PB  - Geological Survey and Mines Bureau
KW  - GEM
KW  - MATERIAL SCIENCE
KW  - SLC
ER  -