Al-Bag, Muzahim Saeed, Ammar Jasim Mohammed, and Mohammed Younis Al-Alaaf. 2018. “A COMPARISON STUDY OF ESTIMATION METHODS OF FORM FACTOR FOR PINUS BRUTIA TEN. IN NINAVA PLANTATION ”. Diyala Agricultural Sciences Journal 10 (1):133-41. https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/1048.