Ndukwu, Macmanus C, and Seth I Manuwa. “Techno-Economic Assessment for Viability of Some Waste As Cooling Pads in Evaporative Cooling System”. International Journal of Agricultural and Biological Engineering, vol. 8, no. 2, Apr. 2015, pp. 151-8, doi:10.25165/ijabe.v8i2.952.