J.Junsomboon P. Sawangsri J. Jakmunee, “Determination of Cadmium and Lead in Concrete Roofing Tiles by Differential Pulse Anodic Stripping Voltammetric Method” (Poster Presentation), The39th Congress on Science and Technology of Thailand (STT.39), 21 - 23 October 2013, , Bangkok International Trade & Exhibition Centre (BITEC), Bangkok, Thailand.