Y.C. Wong, N. Norsyamimi, & W.A. Wan-Nurdiyana. (2021). Determination of Paraquat (Herbicide) Residue Level in Sandy Clay Loam Soil Using High Performance Liquid Chromatography. Journal of Basic & Applied Sciences, 9, 566–577. https://doi.org/10.6000/1927-5129.2013.09.73