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Saaban, Azizan and Zainudin, Lutfi and Abu Bakar, Mohd Nazari (2014) On piecewise interpolation techniques for estimating solar radiation missing values in Kedah. In: 3rd International Conference on Quantitative Sciences and its Applications (ICOQSIA 2014), 12–14 August 2014, Langkawi, Kedah Malaysia.