Dharmaratne, P.G.R.
Gem industry of Sri Lanka - [Colombo] Geological Survey and Mines Bureau 2005 - viii, 113p. : ill. (some col.), col. photos.
Acc No. : 83799 RBL 03/07
9559370010
MINES AND MINING-Sri Lanka
GEMS-Sri Lanka
622.37(548.7) / D4
Gem industry of Sri Lanka - [Colombo] Geological Survey and Mines Bureau 2005 - viii, 113p. : ill. (some col.), col. photos.
Acc No. : 83799 RBL 03/07
9559370010
MINES AND MINING-Sri Lanka
GEMS-Sri Lanka
622.37(548.7) / D4