පරිසර සංරක්ෂණය
Kotagama , Sarath
පරිසර සංරක්ෂණය - Colombo Sri Lanka Kshesthra Pakshi Vidya Kavaya 2003 - 12 p. Illustration 29 cm.
9558576085
ENVIRONMENTAL CONSERVATION
ECONOMICS
NATURAL RESOURCES CONSERVATION
333.7 / KOT
පරිසර සංරක්ෂණය - Colombo Sri Lanka Kshesthra Pakshi Vidya Kavaya 2003 - 12 p. Illustration 29 cm.
9558576085
ENVIRONMENTAL CONSERVATION
ECONOMICS
NATURAL RESOURCES CONSERVATION
333.7 / KOT