Ratnasiri, N., Ceylon Petroleum Corporation, Colombo 09, Sri Lanka
Ratnasooriya, A.H.R., Department of Civil Engineering, University of Moratuwa, Katubedda, Sri Lanka
Ratnasooriya, W. D., Department of Zoology, University of Colombo,
Ratnasooriya, W.D., Department of Zoology, University of Colombo, Sri Lanka.
Ratnatilleke , A., Department of Chemistry, University of Kelaniya, Dalugama, Sri Lanka
Ratnaweera, D., Department of Chemistry, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
Ratnaweera, D.R., Department of Chemistry, University of Sri Jayewardenepura, Sri Lanka
Ratnaweera, P., Department of Zoology and Environment Sciences, University of Colombo, Sri Lanka
Ratnayake , A.S., Department of Applied Earth Sciences, Uva Wellassa University, Badulla, Sri Lanka
Ratnayake , A.S., Department of Applied Earth Sciences, Uva Wellassa University, Sri Lanka
Ratnayake, N., Department of Civil Engineering, University of Moratuwa
Ratnayake, N., IUCN - The World Cnservation Union
Ratnayake , N.P., Ocean University, Mattakkuliya, Sri Lanka
Ratnayake, P. G. D., 0pen University of Sri Lanka
Ratnayake, P. Upali, Sri Lanka Tourism Development Authority, Sri Lanka.
Ratnayake, R. H. M. K., Department of Horticulture and Landscape Gardening, Wayamba University of Sri Lanka, Sri Lanka
Ratnayake, R. H. M. K., Department of Horticulture and Landscape Gardening, Wayamba University of Sri Lanka, Sri Lanka.
Ratnayake, R. H. M. K., Oepanment of Horticulture and Landscape Gardening, Wayamba University of Sri Lanka, Sri Lanka
Ratnayake, R. L., Department of Geography, University of Kelaniya, Sri Lanka
Ratnayake, R. M. C. S., Department of Botany, University of Kelaniya
Ratnayake , R.H.M.K., Wayamba University, Makandura, Sri Lanka
Ratnayake , R.M.C.S., University of Kelaniya, Dalugama, Sri Lanka
Ratnayake, R.M.M.A., Department of Horticulture and Landscape Gardening, Wayamba University of Sri Lanka
Ratnayake, R.R., National Institute of Fundamental Studies, Kandy, Sri Lanka
Ratnayake, T.S., NatBeHo/Nature Beyond the Horizon-The Environmental Society of Horizon campus, Malabe, Sri Lanka

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