Physico-chemical characteristics and quality of feed waters of the El-Oued city study of case (fluorine and arsenic)SE Laouini، Segni Ladjel، MR OuahraniJournal of Fundamental and Applied Sciencesالمجلّد 1، (2)، الصفحات 132015مقال وصول مفتوحعدّة مصادر 1