AL-Obaidy , Dawood Selman. “USING GIBBERELLIC ACID ( GA3) FOR INDUCING MALE STERELITY IN SAFFLOWER (Carthamus Tinctorius L.) ”. Diyala Agricultural Sciences Journal , vol. 3, no. 2, Dec. 2011, pp. 504-10, https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/3054.