WASET
    S.H. Khoon and  G.I. Issabayeva and  L.W. Lee,  Measurement of Rainwater Chemical Composition in Malaysia based on Ion Chromatography Method.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 692 - 699
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/9337.