Daffalla, A., 		Lazim, M., 		Farah, S., & 		Ahmed, E.
(2013).
 Effects of sowing date and skipping of irrigation on growth, yield, and  yield components of winter grown sunflower (Helianthus annuus L.).
<em>المجلة الزراعية, 11</em>(1).
مسترجعة من <a href="http://journals.uofg.edu.sd/index.php/gjas/article/view/51" target="_new">http://journals.uofg.edu.sd/index.php/gjas/article/view/51</a>