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Bahari, H.R. and Sidek, H.A.A. and Adikan, Faisal Rafiq Mahamd and Yunus, W.M.M. and Halimah, M.K. (2012) Infrared Study of Er3+/Yb3+ Co-Doped GeO2-PbO-Bi2O3 Glass. International Journal of Molecular Sciences, 13 (7). pp. 8609-8614. ISSN 1661-6596,