Jassem M. A. Al – Hassien. 2011. “Effect of Acidity and Boiling Time on Food Contamination by Glass , Aluminium , Stainless Steel and Tefal Utensils in Iraqi Kitchens ”. Journal of Madenat Alelem University College 3 (1), 94-104. https://journal.mauc.edu.iq/index.php/JMAUC/article/view/269.