Ratnasinghe , D.R., Faculty of Graduate Studies, University of Sri Jayewardenepura, Gangodawila, Nugegoda Sri Lanka
Ratnasinghe, D.R., Department of Physics Faculty of Applied Sciences University of Sri Jayewardenepura
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, Faculty of Science, University of Colombo, Colombo 03, Sri Lanka
Ratnasooriya, W. D., Department of Zoology, University of Colombo, Colombo 03 (Sri Lanka)
RATNASOORIYA, W. D., Department of Zoology, University of Colombo, Colombo 3
Ratnasooriya, W. D., Department of Zoology, University of Colombo,
Ratnasooriya, W. D., Department of Zoology, University of Colombo, Colombo 03.
RATNASOORIYA, W. D., Departments of Zoology and *Chemistry, University of Colombo, Colombo 3 Sri Lanka
Ratnasooriya, W.D., Department of Zoology, University of Colombo, Sri Lanka.
RATNASOORIYA,, W. D., Department of Zoology and *Department of Chemistry, University of Colombo, Colombo 3, Sri Lanka
Ratnassoriya, W. D., Department of Zoology, University of Colombo, Colombo 03
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, H.U.W.
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, A.S., Department of Applied Earth Sciences, Faculty of Applied Sciences, Uva Wellassa University, Badulla, Sri Lanka
Ratnayake, A.S., Faculty of Science and Technology, Uva Wellassa University, Badulla, Sri Lanka
Ratnayake, B.R.M.N., Department of Marketing Management University of Sri Jayewardenepura, Sri Lanka
Ratnayake, B.R.M.N., Department of Marketing, University of Sri Jayewardenapura, Sri Lanka
Ratnayake, B.R.M.N., Lecturer, Dept. of Marketing Management, University of Sri Jayewardenepura, (Sri Lanka)

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