A, 1., 		D. Elfadil, 2., & 		Muhieldeen, O.
(2019).
 Effect of tractor forward speed and type of transmission system on agricultural tractors performance under clay soil condition.
<em>Gezira Journal Of Engineering And Applied Sciences, 13</em>(2).
Retrieved from <a href="http://37.60.236.48/index.php/gjeas/article/view/1220" target="_new">http://37.60.236.48/index.php/gjeas/article/view/1220</a>