Iqbal, R., M. Zubair, F. Pirzada, F. N. Abro, M. Ali, and A. Valasai. “An Experimental Study on the Performance of Calcium Carbonate Extracted from Eggshells As Weighting Agent in Drilling Fluid”. Engineering, Technology & Applied Science Research 9, no. 1 (February 16, 2019): 3859–3862. Accessed September 28, 2021. https://etasr.com/index.php/ETASR/article/view/2538.