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.
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NA-111
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Aquatic Resources
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