Usman, A., Haque, M. and Umar, B. (2004) “Design, construction and evaluation of an animal drawn disc harrow”, ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, 4, pp. 37-44. Available at: https://azojete.com.ng/index.php/azojete/article/view/320 (Accessed: 21November2024).