Duduyemi, O., K. O. Ogundipe, and J. O. Olajide. 2016. “ANALYSES OF COPPER CONCENTRATIONS IN PALM KERNEL CAKE FROM THREE INDUSTRIAL PALM KERNEL OIL MILLS”. LAUTECH Journal of Engineering and Technology 10 (2):115-20. https://laujet.com/index.php/laujet/article/view/50.