"Determination of Para-Phenylenediamine (PPD) in Henna Samples Collected from Libyan Local Markets Using Spectrophotometric Method". مجلة جامعة الزيتونة , عدد 50, يونيو، 2024, ص 527-38, https://www.azzujournal.com/index.php/azujournal/article/view/281.