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.K, Department of Geography University of Sri Jayewardenepura Sri Lanka
Ratnayake, R.M.M.A., Department of Horticulture and Landscape Gardening, Wayamba University of Sri Lanka
Ratnayake, R.M.T.S.
Ratnayake, R.M.T.S., Department of Physics, University of Sri Jayewardenepura, Sri Lanka (Sri Lanka)
Ratnayake, R.R., National Institute of Fundamental Studies, Kandy, Sri Lanka
Ratnayake, R.R.P.N., Planning and Design Division, National Water Supplies and Drainage Board of Sri Lanka
Ratnayake, T.S., NatBeHo/Nature Beyond the Horizon-The Environmental Society of Horizon campus, Malabe, Sri Lanka
Ratnayake, U.
Ratnayake, U. N., Rubber Research Institute, Telawalla Road, Ratmalana, Sri Lanka.
RATNAYAKE, W. E., Entomology Division, Anti-Malaria Campaign Department of Zoology, University of Sri Jayewardenepura
Raveendran, T., Head, Department of Human Resource Management, University of Jaffna, Sri Lanka
Raveendran, T., Senior Lecturer Department of Human Resource Management University of Jaffna Sri Lanka
Raveendran , Y., Faculty of Graduate studies, University of Jaffna

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