B, E., & 		Gali, M.
(2015).
 Pricing of Sorghum Irrigation Water:  A Comparison between  Gravity, Spate and Rain-fed Irrigations in Sudan.
<em>Gezira Journal Of Economic And Social Sciences, 6</em>(2).
Retrieved from <a href="http://37.60.236.48/index.php/gjess/article/view/319" target="_new">http://37.60.236.48/index.php/gjess/article/view/319</a>