Audu, D., O. S. Balogun, F. A. Adeniji, and Y. Musa. “Effects of Soil Properties and Operational Variables on the Compactibility of a Sandy Loam Soil”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 15, no. 3, Sept. 2019, pp. 777-91, https://www.azojete.com.ng/index.php/azojete/article/view/60.