Evolution and development of water and soil conservation ecosystems- from ancient dry zone forest garden to modern Jaffna market garden
52nd annual sessions of the Sri Lanka association for the advancement of science
- Ratmalana: Sri Lanka Pugwash group, 2001
- 92 p.; 21 cm. Ill. maps
- seminar aesthetics in science .
9559760505
WATER AND SOIL CONSERVATION Eco systems- Sri Lanka