Ramakrishanan K
Sudhajala vitharanam (Malayalam) - Thiruvananthapuram State Institute of Languages 1975 - 445p.
Fresh water
Evolution of water, availability of water, wells, water storage units, water pumps, removing chlorine from water, design of water storage units, pipes, water purification projects/ filters
628.1 / RAM/S
Sudhajala vitharanam (Malayalam) - Thiruvananthapuram State Institute of Languages 1975 - 445p.
Fresh water
Evolution of water, availability of water, wells, water storage units, water pumps, removing chlorine from water, design of water storage units, pipes, water purification projects/ filters
628.1 / RAM/S