00787 a2200265 4500 530 PHY 20124 31204 Gunasinghe, R. M. Physics geometrical optics block 1 Nugegoda The open university of Sri Lanka 1986 1986 [v],117p. 28cm Foundation science leading to bachelor of science degree programme PHYSICS Wikcramasinghe, I. R. Liyanage, L. S. G. Tennakoone, M. M. S. G. K. Sumanasekara, G. U. Hettiarachchi, R. D. Abeydeera, D.R. Vithanage, J. D. Sirikanthi, W. D. M. Alahakoone, M. D.P Sumanawathie, P. D. L 47784 47784 0 0 0 0 LEN MKDL MKDL LEN 2009-07-21 0 530PHY 50917 2009-07-21 00:00:00 0.00 2016-10-31 L 0 0 0 0 LEN MKDL MKDL LEN 2009-10-06 0 50920 2009-10-06 00:00:00 0.00 2016-10-31 L 0 0 0 0 LEN MKDL MKDL LEN 2009-10-07 0 50919 2009-10-07 00:00:00 0.00 2016-10-31 L 0 0 0 0 LEN MKDL MKDL LEN 2009-10-07 0 50918 2009-10-07 00:00:00 0.00 2016-10-31 L 0 0 0 0 LEN MKDL MKDL LEN 2009-10-07 0 50921 2009-10-07 00:00:00 0.00 2016-10-31 L