AU  - Herath, J.W.
TI  - Mineral based industries of Sri Lanka
T2  - Science Education Series
CY  - NARESA
PB  - Colombo
KW  - Education
KW  - Mineralogy
N1  - http://thakshana.nsf.ac.lk/slstic/NA-108/NA_108_i.pdf
ER  -