Freshwater as a natural resource in sri Lanka
Costa, H.H.
Freshwater as a natural resource in sri Lanka - NARESA Colombo 1986 - 58 lk - Sri Lanka Freshwater Chemistry Freshwater Aquatic Fauna Freshwater fish Fish Production Exotic Aquatic Weeds Salvinia Aquatic Weeds Freshwater Pollution Sewage Eutrophication Weedicides Insecticides Industrial Wastes Deforestation Silts - Science Education Series No.18 .
http://thakshana.nsf.ac.lk/slstic/NA-111/NA_111.pdf = Costa, H.H.
M
B
NA-111
NA-111
Education
Aquatic Resources
37
Freshwater as a natural resource in sri Lanka - NARESA Colombo 1986 - 58 lk - Sri Lanka Freshwater Chemistry Freshwater Aquatic Fauna Freshwater fish Fish Production Exotic Aquatic Weeds Salvinia Aquatic Weeds Freshwater Pollution Sewage Eutrophication Weedicides Insecticides Industrial Wastes Deforestation Silts - Science Education Series No.18 .
http://thakshana.nsf.ac.lk/slstic/NA-111/NA_111.pdf = Costa, H.H.
M
B
NA-111
NA-111
Education
Aquatic Resources
37