Obidiegwu, E. O., Ochulor , E. and Mgbemere, H. (2020) “Study of Tribological Properties of Train Brake Block Produced from Clay Blended with Steel Slag”, Journal of Engineering Research, 25(2), pp. 165-172. Available at: http://jer.unilag.edu.ng/article/view/999 (Accessed: 29October2020).