F. S. Izzadeen
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(2016 , Open & Distance Learning)K. A. J. M. Kuruppuarachchi, P. Dias, N. C. Kannangara
(2016 , Open & Distance Learning)G. Bandarage
(2016 , Open & Distance Learning)M. K. Meegahakumbura, S. A. C. N. Perera and L. Perera
(2016 , Life Sciences)W. A. J. M. De Costa
(2016 , Life Sciences)