Hassan, A., & 		Abusabah1, E.
(2018).
 Construction and Usage of Control Charts for Some Properties of Sugar Crystals.
<em>Gezira Journal Of Engineering And Applied Sciences, 13</em>(1).
Retrieved from <a href="http://journals.uofg.edu.sd/index.php/gjeas/article/view/757" target="_new">http://journals.uofg.edu.sd/index.php/gjeas/article/view/757</a>