Mineral based industries of Sri Lanka
Herath, J.W.
Mineral based industries of Sri Lanka - NARESA Colombo 1986 - 87 lk - Sri Lanka Economic minerals Ferrous group Ferro Alloy Group Non-ferrous mineral group Non-metallic mineral group Mineral Policy - Science Education Series No.15 .
http://thakshana.nsf.ac.lk/slstic/NA-108/NA_108_i.pdf = Herath, J.W.
M
B
NA-108
NA-108
Education
Mineralogy
37
Mineral based industries of Sri Lanka - NARESA Colombo 1986 - 87 lk - Sri Lanka Economic minerals Ferrous group Ferro Alloy Group Non-ferrous mineral group Non-metallic mineral group Mineral Policy - Science Education Series No.15 .
http://thakshana.nsf.ac.lk/slstic/NA-108/NA_108_i.pdf = Herath, J.W.
M
B
NA-108
NA-108
Education
Mineralogy
37