Environmental Problems (in sinhala)
Fernando, M.J.B.
Environmental Problems (in sinhala) - NARESA Colombo - 45 lk - Marine pollution Mangroves Green house Effect Acid Rains Muthurajawela Water Pollution Ozone Layer Sri Lanka - Science Education Series No.33 .
http://thakshana.nsf.ac.lk/slstic/NA-126/NA_126.pdf = Fernando, M.J.B.
M
B
p939
NA-126
Education
37
Environmental Problems (in sinhala) - NARESA Colombo - 45 lk - Marine pollution Mangroves Green house Effect Acid Rains Muthurajawela Water Pollution Ozone Layer Sri Lanka - Science Education Series No.33 .
http://thakshana.nsf.ac.lk/slstic/NA-126/NA_126.pdf = Fernando, M.J.B.
M
B
p939
NA-126
Education
37