ගුණසේකර, සමන් පුෂ්පා

ජල සම්පත - කොළඹ ඇස්.ගොඩගේ ප්‍රකාශකයෝ 2015 - 104 p. - අප ජීවත්වන ලෝකය .

9789553057037


BOOKS BOX B2053
ECONOMICS
ENVIRONMENT
HYDROSPHERE RESOURCES
SEA WATER
SOCIAL SCIENCE
STRUCTURE OF WATER
UNDER GROUND WATER POLLUTION
UNDERGROUND WATER
WATER
WATER FALSE
WATER MANAGEMENT
WATER POLLUTION
WATER RESOURCE

B2053 / LDC