Al-talb, Mhasen, Azza Al-qusaymy, and Abeer Al-shabkon. 2007. “Comparison Between Two Methods, H.S.L. And The Iteration Method to Estimate Parameter of Ridge”. TANMIYAT AL-RAFIDAIN 29 (86):170-79. https://doi.org/10.33899/tanra.2007.161705.