Ahmed, Salem, Mahmud Ashtewi, و Taghreed Abuattwan. 2024. "Determination of Total and Available Phosphorus in Soil Samples Collected from Tarhuna, Libya Using Spectrophotometry". مجلة جامعة الزيتونة, عدد 49 (مارس): 712-27. https://azzujournal.com/index.php/azujournal/article/view/260.